Steamed Prawn Dumplings

Name: Steamed Prawn Dumplings
Ingredients: 100 g Wheat Starch; 50 g Potato Starch, Corn Starch OR Tapioca Starch; 1 pinch Salt; 160 ml Boiling Water; 1 teaspoon Vegetable Oil; 200 g Uncooked Peeled Prawns; 1 teaspoon Sake (Rice Wine); 1 small piece Ginger *finely chopped; 50 g Bamboo Shoot *finely chopped; 1 Spring Onion *lighter colour parts only, finely chopped; 1/4 teaspoon Salt; White Pepper as required; 1/2 teaspoon Sugar; 1-2 tablespoons Potato Starch, Corn Starch OR Tapioca Starch