Open an e-commerce app at random and input prefabricated dishes or convenience dishes and instant dishes. A large number of dish information will pop up: shredded fish flavored pork, preserved pork with plum vegetables, cumin lamb chops, spring rolls with vegetables... Attractive pictures, with prices ranging from a dozen to dozens of dollars, link to "100000+" comments, and websites of different brands one after another. It seems that prefabricated dishes have become a regular spare part of many consumers' shopping carts overnight. Prefabricated dishes are convenient, but can they be delicious and healthy while enjoying convenience? Can we meet people's high demand for nutrition? The reporter interviewed relevant experts in this regard. After tasting, we learned that according to the standards issued by the China Cuisine Association, pre prepared dishes are "finished or semi packaged dishes made of one or more kinds of agricultural products as the main raw materials, through pre processing (such as cutting, stirring, pickling, rolling, molding, seasoning, etc.) and pre cooking (such as frying, frying, baking, cooking, steaming, etc.), and using standardized flow process". Fan Zhihong, Professor of the Department of Nutrition and Food Safety, School of Food, China Agricultural University, introduced: "Prefabricated dishes can be divided into four types: ready to eat, instant hot, instant cooking and instant preparation. Instant food refers to the products that can be directly eaten after being opened. Instant hot food refers to the products that have been cooked or partially cooked and can be eaten after simple reheating. Instant cooking refers to the products that can be eaten after having completed certain processing of main raw materials and cooking. Instant preparation refers to the products that can be prepared immediately after simple processing such as cleaning, cutting, etc Products used in dishes. " It may only be known by tasting the prepared dishes. Everyone has different taste preferences, and even the evaluation of the same dish is different. Taking a brand of crispy meat as an example, some people say that "the sweet potato powder outside tastes chewy, and the meat inside tastes delicious", while others say that "the powder is thick, the meat smells fishy, and the pepper is actually whole". After the actual experience, I can taste that the prepared dishes are not the same as the home cooking dishes. Why can prefabricated dishes taste like home cooking can't? Fan Zhihong explained that chefs were involved in the research and development of prefabricated dishes, and the rich condiments made the dishes taste rich. There may be seven or eight or more spices in a prepared dish, such as cardamom, thyme, rosemary, basil, etc. Generally, you don't need so many spices when cooking at home. However, experts specially pointed out that the richness of the flavor of prepared dishes is not completely related to additives, because many spices are natural. Although there are additives in fish sauce, soy sauce and other condiments, they can also be used in home cooking. There is also a difference between prepared dishes and those prepared and sold in restaurants. The reporter learned in the interview that the production process, freezing technology, reheating techniques and other factors will affect the taste of prepared dishes. An organization has conducted sensory evaluation on more than 50 kinds of products from different manufacturers in terms of aroma, taste, comparison before and after cooking, etc. The results show that under the condition of different taste reducibility of different dishes, the taste reducibility of meat dishes is higher than that of fish and shrimp, and that of boiled products is higher than that of fried products. According to Zhang Chunhui, the chief scientist of the innovation team of the Institute of Agricultural Products Processing, Chinese Academy of Agricultural Sciences, the products and industries that chefs make and sell now