2. Accessories: 2 dried hawthorn, 2 tablespoons salt, 1 tablespoon sugar, a little cooking wine, a little soy sauce, 1 star anise, a little pepper powder, a proper amount of chopped green onion and a proper amount of water.

3. Cut the beef into large pieces, put it in cold water, soak it in blood and change the water once or twice. Bloodshot will make the cooked beef fishy and hard, and the soup will foam easily, which will affect the taste, so it is necessary to remove bloodshot.

4. Put the beef pieces in cold water, heat and boil for more than ten seconds, and skim off the floating foam on the surface. Most of these floating foams are blood and impurities, and there is also a little protein. Just pour it out.

5. Take out the soaked beef and rinse it with warm water. Don't blanch the beef until it is completely cooked. It's not very delicious after it's fully cooked, but it's seven or eight ripe and slightly pink. Don't wash with cold water, it will make the meat shrink quickly and harden when it is cold.

6. Cut the onion into large pieces, cut the tomato into large pieces, scrape the potato clean, cut half into dices, put it in an electric pressure cooker, and cut the other half into large pieces for later use.

7. Add a proper amount of cold water to the pot until it just covers the ingredients, and then add salt, sugar, cooking wine, soy sauce, star anise and pepper powder to the water.

8. After the seasoning is evenly mixed, start the "beef and mutton, stew" procedure. Because the electric pressure cooker is different, the meat program is generally selected.

9. After the voltage operation is completed, pour the soup and beef into the iron pot. Press the diced potatoes into the soup with the bottom of a spoon. You don't need to add oil to the pot, and the oil of the beef itself will dissolve in the soup, which can make the soup more delicious. At this time, the oil flower floating on the noodle soup belongs to the beef itself.

10, put the dried hawthorn and the remaining big potatoes into the soup, cook until the potatoes are soft and rotten, and sprinkle with a little chopped green onion for decoration.