1, not necessarily. Generally, you need tin foil for barbecue steak, but you don't need tin foil for barbecue other meat (such as kebabs). Tin foil can isolate electromagnetic waves. For example, cooking chicken legs, if tin foil is not used, the place with less meat may be burnt, and other places are unfamiliar.

2. To heat the meat in the oven, it needs to be completely wrapped with tin foil for two reasons: to prevent the gravy from splashing; It can prevent the meat from becoming too dry after being heated for too long. Complete wrapping can fully heat the food and wrap the water, so that it tastes better after heating and will not be undercooked.

3. Which side of the tin foil is used in the oven? Careful observation of tin foil shows that its two sides are different. One side is bright and the other side is dark. The bright side is called the photosensitive side, and the dark side is called the matte side. When we use it, we should use the frosted side to touch the food, and the photosensitive side is exposed. If you accidentally use it backwards, the photosensitive surface will touch the food, which may cause the food to stick to the tin foil.