A Japanese tofu dish, commonly served as an appetizer. Bonito flakes, green onion, and grated daikon are often served on top of this dish.
Bring dashi, soy suce, and mirin to a boil in a small saucepan.
Dissolve the 1 Tbsp. of the potato starch in the water in a small container. Stir in to the boiling dashi and remove from heat.
In a heavy, deep pot, heat oil to 350.F. Meanwhile, dust the tofu all over with the remaining potato starch.
Deep-fry tofu until light brown. Remove from oil and let drain.
Adjust seasoning of dashi. Pour some of the sauce over the tofu in a small dish and serve immediately.