Crispy dried sweet potato is the main ingredient of baking: tomato sauce, two seasonings of sweet potato. Appropriate steps: 1. Clean the sweet potato to remove the dirt and dirt on the surface, 2. Peel the sweet potato with a plane, and dig the bad part with a knife, 3. The sweet potato is cut in half horizontally, then sliced vertically with a thickness of about 8mm, and then cut into sweet potato strips, thus baking.