1. Stir together KELLOGG'S® RICE KRISPIES® cereal, flour, soda, salt and cinnamon. Set aside. 2. In large electric mixer bowl, beat together margarine, granulated sugar and brown sugar until well combined. Add egg whites, lemon peel and the 3 tablespoons lemon juice. Beat well. Add cereal mixture, mixing until combined. Drop by slightly rounded tablespoon onto baking sheets coated with cooking spray. 3. Bake at 350° F about 14 minutes or until light golden brown. Remove from baking sheets and cool on wire racks. Glaze hot cookies with mixture of powdered sugar and the 2 tablespoons lemon juice. Store in airtight container.