1. Wash and drain the shrimp skin, and cut the tofu into 3 cm square pieces. 2. Put the oil in the pan, add the onion and ginger, stir-fry until fragrant, add the shrimp skin (or add a proper amount of shrimp sauce) and stir-fry for about 2-3 minutes until the shrimp skin is slightly yellow, then add about 150 ml of water, and add the tofu to cook. If the shrimp skin is not salty enough, you can add a little salt and a little starch when you take it out of the pot.