Oil for frying Mash tofu. Combine with carrot, leeks & sesame seeds. Knead as if kneading bread, for 3 minutes. When dough is smooth, moisten palms with oil & shape into patties. Fry patties in oil as if frying regular meat hamburger. Fry till crisp & nicely browned, about 4 minutes per side. Drain & serve hot in a hamburger bun with mustard, lettuce, ketchup, pickle & tomato.