1 Prepare clean glass bottles before homemade tomato sauce. The requirements must be completely sealed glass bottles. After scalding and disinfecting the bottles and caps with hot water, turn them upside down and completely control the water in the bottles for use. The treated glass bottles must be free of oil and raw water.

2. After the tomato sauce is boiled, put it into a glass bottle while it is hot, leaving a gap of about 1cm on it, then drop a small amount of high-alcohol liquor or lemon juice, and immediately tighten the bottle cap. If you are worried that the sealing effect of the bottle cap is not very good, you can cover it with 1 to 2 layers of plastic wrap first, and then tighten the bottle cap.

3. After the ketchup in the glass bottle is completely cooled, it can be moved into the refrigerator for refrigeration or stored at room temperature.