Yam, also known as Hu Aishan. At present, there are two kinds of common varieties on the market, one is common yam, and the other is iron stick yam. Although they are both Chinese yam, they are quite different in taste, nutritional value and methods. In order to make it easier for everyone to choose the right variety of yam, here are four ways to learn how to distinguish yam.

First, the shape and appearance are different 1. Iron stick yam is the best of yam, because its nutritional value and efficacy are stronger than ordinary yam, so it is also a commonly used medicinal material in Chinese medicine. Compared with common yam, iron stick yam is slender, generally 2~3 cm thick, with a round head and a pointed tail.

Iron stick yam skin is rough and unique. In addition to the thick whiskers, there are common red rust spots. The skin is very thin, uneven thickness and ugly. The importance of a single branch is no more than 4 Liang. When buying, you must not judge a person by his appearance, otherwise you will buy a fake iron yam.

2. Ordinary yam, also known as vegetable yam and crisp yam, has a smooth skin without "rust spots", a little pimple and scattered whiskers, a uniform and regular shape and a thickness of up to 4 cm.

Second, the section color is different. If the first point is complicated, then the most direct judgment method is the second point. Cut the yam and let it stand for 10 minute, and then judge it according to the color of the slice. Real iron yam is not easy to oxidize and turn yellow no matter how long it is placed, but vegetable yam is different. After cutting, if it is not soaked in water, it is easy to be oxidized by gas and turn yellow.

Third, the iron stick yam is hard and not easy to break, with fine texture and less mucus. On the other hand, ordinary yam is very brittle and easy to break. At the same time, ordinary yam has more water and mucus than iron stick yam.

Fourth, the taste is different. The third point is to introduce the texture of yam. Because of the different textures, the tastes of the two boiled products are naturally quite different. Iron stick yam is easy to cook, but it is also easy to cook, and it tastes slightly numb in glutinous rice flour. Ordinary yam tastes crisp and refreshing, and it is not easy to rot when cooked for a long time, so it is especially suitable for cooking. For example, it is used in common home-cooked sauces, such as stewed pork ribs with yam.

How to avoid itchy fingers when peeling yam, many friends often have red hands and itchy fingers. Here are two tips for everyone. The first is to wear gloves, which is simple and practical. If you feel that wearing gloves is always a bit awkward, try this method. Bake your hands with fire until they are warm or soak them in white vinegar for 5 minutes, which can also effectively prevent saponin from causing itchy fingers on yam skin.