This is very similar to curry puffs, but instead of puff pastry you use slices of bread, like the English toasties. This is a fun recipe for children.
Remove crusts from bread; cover with a damp towel or plastic wrap to keep soft. Make crumbs from crusts by putting a few at a time into a blender.
Combine three tablespoons bread crumbs with chicken, peanuts, green onion, 5-spice powder, curry powder, sugar, pepper, soy sauce, and parsley; mix well.
Roll bread slices very thin with a rolling pin. Cut each square in half, place a teaspoon of chicken mixture on each piece. Brush edges of bread with egg yolk; fold in half to form a square. Pinch to seal, trimming if necessary.
In a deep fryer, heat oil. Fry three or four chicken squares at a time, turning once until desired brown color is reached (about two minutes). Remove from oil and drain on absorbent paper. Repeat until all squares are cooked. May be served with mustard sauce. Makes about 36.