Roasted sweet potatoes, also known as baked sweet potatoes, have a name called roasted white jade. In rural areas, after the harvest of sweet potatoes, people place sweet potatoes in unburned ash after the fire, cover the sweet potatoes with carbon ash with Mars, and after a suitable time, they can bake it, bake it, and peel it off. You can eat it. But nowadays, people generally use ovens and microwave ovens to bake sweet potatoes.
Hot and roasted sweet potatoes are sweet and delicious, and some of them are baked with “sugar oilâ€. The coke-burning of sweet potato skin is even more popular. Many people eat together with the skin.
Experts say that it is best not to eat roasted sweet potatoes, because sweet potato skin contains more alkaloids and eating too much can cause gastrointestinal discomfort. In particular, sweet potato skin with black spots is even more inedible and can cause poisoning. Sweet potatoes are rich in nutrients. It has been determined that each kilogram of sweet potato contains 290 grams of sugar, 23 grams of protein, 5 grams of crude fiber, and 2 grams of fat. It also contains a variety of vitamins and minerals. The content of vitamins is similar to that of oranges and tangerines. In particular, sweet potatoes with yellow hearts have a carotene content of 52 mg per 100 grams. Sweet potatoes can supply a lot of heat to the human body. One kilogram of sweet potato can produce 5317 kilojoules of heat, while 1 kilogram of white flour or rice produces only 14779 kilojoules of calories. What is even more wonderful is that the protein contained in the sweet potato has a complementary effect on the protein in the rice noodles, which can obviously supplement the lack of vitamin C in the flour, the calcium in the rice, and the lack of both carotene. Sweet potato and rice, mixed with white flour, can increase the nutritional value of the staple food and make people prolong life.
Dr. Li Shizhen, a physician of the Ming Dynasty, said: “People in the sea have a lot of life, but they also eat sweet potatoes.â€
Eat sweet potatoes must pay attention to the time and method
1, sweet potato is best to eat at noon
This is because after we have eaten sweet potatoes, the calcium contained in them needs to be absorbed within 4 to 5 hours in the human body, and the afternoon sun exposure can just promote the absorption of calcium. In this case, eating sweet potatoes at lunchtime, calcium can be fully absorbed before dinner, and will not affect the absorption of calcium in other foods during dinner.
2, sweet potatoes should not be eaten raw
Because the cell membrane of starch in sweet potato is not destroyed by high temperature, it is difficult to digest it in the human body. At the same time, when boiled sweet potatoes, the cooking time should be properly extended so that the “vaporizing enzyme†contained in sweet potato is destroyed. After eating, there will be no feeling of discomfort such as bloating, heartburn, snoring, nausea, and exhaust.
3, sweet potato with eat well
If the sweet potato and the rice noodles are eaten together, they can also play a complementary role in the protein; if they are eaten together with pickles or fresh radishes, they can reduce the production of gastric acid.