What are the methods of stewing?

What are the methods of stewing? What are the skills of stewing? There are two methods of stewing:

1. Non water proof stewing: the non water proof stewing method is to scald raw materials in boiling water to remove blood stains and fishy smell, and then put them into pottery vessels, add onion, ginger, wine and other condiments and water, cover them, and cook them directly on the fire. When cooking, stir fry first, skim the foam, and then move to a low heat to stew until crispy. Stew time, according to the nature of raw materials, generally about two or three hours.

2. Water proof stewing method: the water proof stewing method is to scald the raw materials in boiling water to remove the fishy dirt, put them into porcelain and pottery bowls, add seasonings such as green onion, ginger, wine and soup juice, seal them with paper, put the bowls into the water pot, and cover the pot tightly to avoid air leakage. Burn with fire. Make the pot never break boiling, about three hours to stew.

This kind of stewing method can make the fresh flavor of raw materials not easy to lose, and the dishes made have enough flavor and clear soup. The effect of steaming and stewing is basically the same as that of non water stewing. However, due to the high temperature of steaming and stewing, it is necessary to master the steaming time. If the steaming time is not enough, the raw materials will be immature and less fragrant; if the steaming time is too long, the raw materials will be too ripe and rotten and lose the flavor.