In a mixing bowl combine the milk, egg and melted margarine. Add the orange juice, rind, chopped apples (skins can be left on) and vanilla. Sift together the flour, salt, baking powder. Stir into milk mixture with a spoon until blended. Do not overmix. Preheat oil in a skillet to 350 degrees. Drop off end of tablespoon into hot oil. Fry to a golden brown. Turn so they brown even. Allow to cool. Roll in powdered sugar.