Beat eggs, add sugar gradually. Sift flour with baking powder and salt, and add to egg mixture alternately with oil. Add orange rind last. Form into soft dough. Form into a ball and wrap in floured waxed paper. Refrigerate for several hours or overnight. Break off a piece large enough to roll into a ball about the size of a golf ball. Roll and pat it down and into a circle about 2 3 inches in diameter, on top of a floured piece of waxed paper (you may want to flour your hands a little bit, too). Fill with your favorite filling. Roll up the sides and pinch corners together in the shape of a triangle. Place on greased cookie sheet and bake at 180ºC or 20-25 minutes or convection bake at 160ºC or 15-20 minutes, or until LIGHTLY browned. Cool on racks. Suggested fillings: Chocolate chips, M&M's, chocolate kisses, cherry pie filling, apricot jam and marzipan. ----