1. Knead the dough with flour, milk, sugar, salt and yeast until smooth, and put it in a warm place for fermentation. Roll the dough into a cake, with a thickness of about 0.3cm, and punch holes to avoid heat expansion, leaving a circle without buttons. Put the crust into the pot, cover it, and bake it on low heat until the bottom of the crust is brown. Just pay attention to one side. At this time, the skin is half cooked.
2. Wash and drain onions, red peppers, mushrooms and ham, and dice them for later use. Stir-fry onions first, then pour in other vegetables and stir-fry, spread tomato sauce, sprinkle cheese, sprinkle ham and vegetables. Put it in the microwave oven, adjust the time according to the power of the microwave oven, and soften it.