Liu Che obviously didn't believe it, but Liu Tan didn't mean to explain. Instead, he said, "Try something else."

Liu Che was suspicious, but he still listened to Liu Tan and tasted other dishes.

So the following conversation took place: "What is this made of?"

"beans."

"What is this made of?"

“Beans too.”

"What about this?"

"It's still beans!"

In the end, Liu Che was so angry that he laughed. He simply put down his chopsticks and asked, "Why don't you just tell me what is here that is not made of beans!"

Liu Tan took a look and said, "It's not the fish soup, and neither are the vegetables."

Liu Che took a look and found that apart from the few things Liu Tan mentioned, the rest of the meat dishes were almost all made of beans.

He simply asked, "Don't keep me in suspense, just tell me."

Liu Tan said with a smile: "Really, they are all made from beans, but they are made in a different way. Even the oil used to cook these dishes is squeezed from beans."

The exact statement is that it is boiled first and then squeezed, but Liu Tan deliberately spread this rumor.

The process of making soybean oil is actually the same as that of drying salt, and it does not require much technical skills. However, this is one of the magic weapons for the Northern Border Country to get rich today. If it is taken away by others, even if it does not seriously damage Liu Tan's vitality, it will make him uncomfortable for a while.

So he could only selfishly conceal the recipe first, wait until soybean oil became popular, and then find ways to cooperate with others, or in other words, if the Northern Country had other ways out, soybean oil would be dispensable, and it didn't matter.

When Liu Tan said this, the officials present were all a little surprised. Even the emperor sitting on the throne couldn't stop them from asking: "Can beans produce oil?"

This question was full of doubt. It wasn't that they didn't believe Liu Tan, but mainly because this matter was beyond their imagination.

Soybeans don't look like they contain oil no matter how you look at them. Where does the oil come from?

Liu Che also didn't believe it, but he knew his son. If it was not a certain thing, it would be impossible to get a definite answer from Liu Tan unless he cheated.

Now that Liu Tan has said so confidently that these dishes are made from beans and the oil is also made from beans, it means that it must be true.

Liu Tan said with a smile: "If Your Majesty is interested, I can go with you tomorrow to see how those things are made, and how soybean oil is squeezed."

Liu Che glanced at him and nodded slowly: "Okay."

After agreeing, Liu Che continued to slowly savor the dishes in front of him.

After Liu Tan solved the mystery, Liu Che could indeed faintly taste the special flavor of beans when eating these dishes.

But that flavor has been almost masked, and if you don't pay attention, you can hardly taste it. Even if you can taste it, it blends well with other flavors and doesn't feel pungent at all.

I have to say that after eating this table of semi-vegetarian food, I did not feel as greasy as I usually do after eating a lot of fish and meat, but the taste was just as good.

When Liu Che finished his meal, Liu Tan sent him back and said, "I will give these recipes to the imperial chefs and have them study them carefully. When we return to Chang'an, they will also prepare them for your father. This way, we can satisfy your cravings while also ensuring that you don't get stomach upset from eating too much greasy food."

Liu Che could not understand things like the three highs and diabetes, but at his age, it was indeed uncomfortable to eat too much of things that were difficult to digest.

But people always have appetites. Although Liu Che was a little picky in this regard, he did not not care at all.

Considering his health, it seemed like he hadn't enjoyed such delicious food in a long time.

In addition to seeking longevity, people who seek immortality more often pray for their health to be as healthy as when they were young, without worries or illness.

Liu Che turned his head and glanced at Liu Tan, rubbed his son's head and said, "You are thoughtful, boy."

Liu Tan chuckled and said, "There are many things like tofu skin that can be made into vegetarian dishes. These dishes are nothing special. I'll ask the royal chef to develop a few more so that you don't get sick of them."

Liu Che responded, sniffed the fragrance of the flowers, looked up at the starry sky that seemed within reach, and because he had drunk some wine, he really felt like he was floating in the air for a moment.

After Liu Tan helped Liu Che to sleep, he gave orders to his subordinates to prepare for tomorrow's itinerary.

He tried to make breakfast light the next morning, and the glass of white drink was what surprised Liu Che the most.

It tasted like soy milk but also had a special aroma. I couldn't help but ask, "What is this?"

“It’s soy milk!”

Liu Che was a little surprised: "Soy milk?"

Liu Tan nodded seriously. He was also a little puzzled. King Huainan had made tofu, so why was there no soy milk?

At least there is no soy milk in the time and space he is in, so it is just right to make some for Liu Che to drink.

Liu Che counted and found that from yesterday till now, all his diet seemed to be related to beans. Thinking that most of the land in the northern border country was suitable for growing soybeans, he couldn't help but realize something.

After breakfast, Liu Che did not rush to see how the beans were squeezed for oil, but instead took a look at the itinerary arranged for him by Liu Tan.

After reading it, Liu Che said with a mixture of laughter and tears, "Is it such a full schedule for me?"

Liu Tan nodded vigorously, looked at him eagerly and asked, "If there's anything else that Your Majesty doesn't like or is not satisfied with, I'll change it."

Liu Che glanced at him and picked up his pen to make a bunch of changes on the itinerary. Liu Tan took a look and found that he had postponed many of the itineraries, so that the entire itinerary basically spanned all the time he spent here for summer vacation, but correspondingly, there would be a few days left between projects.

Liu Tanyi said, "It seems to be too full. Father also needs a rest in the middle."

Liu Che said angrily: "I need time to deal with government affairs!"

"Ah?" Liu Tan was stunned for a moment. He thought... Liu Che was just here for vacation, but he didn't expect that he still had government affairs to deal with.

It feels neither unexpected nor surprising.

Liu Che couldn't help but reach out and knocked Liu Tan on the head and said, "Not only me, but you also want to ignore the government affairs of the Northern Border for two or three months? Or do you want me to help you handle government affairs again? Don't even think about it!"

Liu Tan suddenly felt a little embarrassed: "Oh."

Come to think of it, it is impossible for Liu Che to not take care of any government affairs for two or three months after he came out. Even if Liu Ju was in the capital to supervise the country, there were still many things that required Liu Che's approval. Even if those opinions were put forward by Liu Ju, Liu Che had to write a "yes" before they could be implemented.

Thinking of this, he felt much more relaxed. At least he didn't have to worry about having nothing for his father to play with later on.

After Liu Che revised the itinerary, he was quite impressed by the items on it, and several of them made him very curious.

But he was very patient and didn't rush to ask. He enjoyed the surprise that Liu Tan had created something magical again. Restraining his curiosity was a necessary process to experience this surprise.

Otherwise, if he asked, Liu Tan would definitely answer, and he would already know everything, and it would be meaningless then.

Liu Tan took Liu Che all the way to several workshops that were specially made clean for the display.

The workshops were connected, with the bean picking area at the front. Liu Tan patiently explained, "Whether it's for oil extraction or making tofu and bean skin, you have to choose the best beans."

There is nothing interesting to see in this part, the next step is to grind the soy milk.

Liu Tan pointed at the slaves being transported over there and said, "The ground soy milk is divided into two parts. One part is used to make soy flakes and tofu, and the other part is taken over to make tofu skin."

Liu Tan looked at Liu Che and said, "The vegetarian chicken and meat that your father ate yesterday were all made from bean curd sheets."

Liu Che watched those people repeatedly boil soy milk, let it cool, and then after a while they picked up a thin piece of skin from it, which seemed to be the tofu skin.

Liu Che looked at them and suddenly asked, "Why are these two different?"

When Liu Tan saw that Liu Che was asking about tofu skin and bean curd sheets, he said, "These two are actually similar, but the quality is different. The best is the first layer, which will be made into tofu skin. The rest of the slightly lower quality will be made into bean curd sheets. The lowest quality ones at the end are used to make other seasonings."

These fresh bean curd sheets were transported to the drying yard at the back. As soon as Liu Che walked over, he saw a large area of ​​dried bean curd sheets and bean curd sheets.

The official behind him couldn't help but say, "His Royal Highness the King of the North truly has... a brilliant idea."

To be honest, if they hadn't seen the production process with their own eyes, they wouldn't have imagined that these things were made from beans.

Liu Tan smiled and said, "Northern Border is suitable for growing beans, but the range of beans used before was too narrow. We had no choice but to develop new ways to eat them. We were forced to do so."

Someone cleverly flattered him immediately, saying, "Your Highness is the one who can make these things without sticking to any particular method. If it were your servant, I would never be able to make them even if I were forced to death."

Liu Tan smiled reservedly, then took Liu Che to the other side.

Everyone is familiar with making tofu, but they are a little curious about how to make bean flakes using the same process.

Bean slices are different from bean skins and cannot produce a taste comparable to meat dishes, but even as a vegetarian dish, it tastes pretty good, especially when a handful of thin bean slices are blanched in the fish soup, the taste is still okay.

After reading this part, the rest is the highlight - soybean oil.

What he showed everyone was the boiling method, which is to boil the beans little by little to produce soybean oil, and every process was clearly visible.

Of course, Liu Che was not really asked to stand there and watch the entire sequence. Most of the time, everyone was just shown the beginning, and then it was explained what would be concluded and then proceed to the next step.

At the end, when everyone really saw the oil bubbling in the boiling pot, they were so surprised that they were speechless.

Even after reading those steps, people still don’t understand how beans produce oil.

The time for this visit was not tight and the itinerary was not tiring, so Liu Che could go back and rest for a while.

After returning, Liu Che wanted to take a rest as usual.

Lu Xuan waited until Liu Tan left Yanshou Hall before approaching him and asking, "Why did you show them the entire oil pressing process? I see several people have memorized the entire process. What are you going to do?"

Liu Tan looked up at Lu Xuan and said with a smile, "Don't worry, I did it on purpose."