Prawn toast is a delicate prawn mousse with a crisp base that happily brings to mind a quality yum cha lunch. Now it's being reinvented by contemporary chefs using luxury ingredients such as scallops or foie gras.It's easy to make and is great party food. Cut into rounds,triangles or fingers,and serve with lemon soy,chilli sauce,or a hot,sweet,sour relish. Note you will need to refrigerate the prawn paste for two hours before frying.