The process of pizza sauce: 1. Soak tomatoes in hot water and chop them; 2. Heat a tablespoon of olive oil in the pot, add minced garlic and onion and stir fry; 3. Pour chopped tomato and stir-fry soup, add stock and stir-fry evenly, then add tomato sauce and stir-fry evenly; 4. After boiling, turn to low heat until the soup is half; 5. Sprinkle with starch water and stir constantly with a shovel to keep the soup slightly boiling and bubbling until it is sticky. Pour in black pepper and stir well. Precautions for pizza sauce: 1. I use olive oil. If you like the taste of butter, you can use butter instead of olive oil. 2. I mixed the soup with a spoonful of magic kitchen soup+150ml warm water. It would be better if there were soup. 3. Step 4, remember to stir the tomatoes several times in the middle, and crush the tomatoes with a shovel when stirring; 4. The prepared pizza sauce can be cooled, sealed and frozen. If it can be eaten within 3 days, it can be sealed and refrigerated.