Tile jar simmered dishes have high nutritional value. Belong to the original ecological nutrient-rich dishes. Wagang simmering dishes can to a large extent to preserve the various nutrients of the dish, more in line with the requirements of a healthy diet. This is because, when frying, the boiling point of oil can reach more than 300 ℃, will destroy the nutrients. Compared with it, simmering vegetables in the boiling point of water is only 100 ℃, nutrients can be retained more, simmering vegetables contain polyphenolic nutrients, such as flavonoids, quercetin and other content significantly higher than other cooking methods. Vegetables in the protein, vitamins, various trace elements to maintain the original state. In addition, simmering vegetables require fresh raw materials, moderately flavored, and less loss of original juice, with complete form, taste tender, cooked and rotten advantages.