Practice: two spoonfuls of soy sauce, two spoonfuls of balsamic vinegar, two spoonfuls of tomato sauce, one spoonful of sugar, one spoonful of starch and half a bowl of water. Cut the tofu into pieces, coat it with starch, coat it with egg liquid, fry until both sides are golden, cook the sauce until it bubbles, pour in the tofu, coat it with sauce, and sprinkle with white sesame seeds.