1. Wash pig's trotters with clean water and cut them into small pieces with a knife for later use.
2. Soak the tofu in salt water 10- 15 minutes, wash it with clear water and cut it into small pieces.
3. Put the pig's trotters into a washed pot, add about 2500g of water and cook until the meat is rotten. Add salt, onion and monosodium glutamate to tofu and bring to a boil.
2. The practice of tomato mutton soup
1. Wash the mutton, put the whole piece into the pot, add water until it is half done, take it out and cut it into small squares for later use;
2. Peel potatoes, remove seeds from tomatoes, and cut them into small cubes with onions, Chinese cabbage and carrots;
3. Add a small amount of minced onion to tomato sauce, stir-fry with oil, and add 1 tablespoon mutton soup to make tomato sauce;
4. Take 1500g mutton soup and boil it. Put the chopped mutton and all vegetables into the soup, add salt and tomato sauce.
5. After the soup is cooked, add pepper and remove the coriander powder.