Pour warm water into a bowl. The water temperature should be about 35 40°C. Add the dry yeast and stir well. Let it stand for 5 10 minutes until a layer of foam appears on the surface of the yeast solution.....

Wash the vegetables. Cut the tomato and cucumber into thin slices, and tear the lettuce into appropriate - sized pieces. If using meats, the ham can be directly sliced, the bacon needs to be fried until both sides are golden and crispy, and the chicken and beef can be fried or boiled in advance and then sliced.....