2. Cut the peeled tomato into large pieces-if there are immature green seeds in the tomato, remove them so as not to affect the taste.
3. Break the tomato with a blender-cut the tomato into large pieces before breaking it, so as not to lose too much juice during cutting.
4. Pour the broken tomato juice into the pot, add rock sugar, boil and turn to low heat. -When it is cooked until it is thick, stir it with a shovel from time to time to avoid sticking to the pot.
5, until it is sticky like "sauce", squeeze in the right amount of lemon juice and continue to simmer for three or four minutes.