Ingredients: 5 ~ 6 tomatoes, 60g rock sugar and half lemon.

1. Mash tomatoes directly with a rolling pin (or with a cooking machine).

2. Find a deeper pot, and then put the mashed tomatoes in the pot.

3. Just turn on a small fire, then add 60 grams of rock sugar and stir it from time to time.

This process is a bit slow, so I am desperate that my children can eat ketchup without it.

5. Cook until the tomato sauce turns red and a little thick, and continue to stir.

6. After an hour, squeeze some lemon juice in. Lemon juice is a natural condiment and preservative.

7. After adding lemon juice, continue to stir, 10 minutes later.

8. Let it cool and then put it in a jar, preferably a glass jar. If it is dried in advance, it must be dry without moisture.

1 Sprinkle a little salt evenly on the tomato sauce, and then pour some cooked cooking oil. This happens every time after feeding.

2 Steam the tomato sauce in a pot, and then pour in a small amount of high-alcohol liquor or lemon juice. It doesn't matter without white wine and lemon juice. Just cover it with 1 ~ 2 layers of plastic wrap while it is hot, and then tighten the bottle cap.