In a small mixing bowl, blend together Watkins Ground Cinnamon and sugar. Set to the side. Core and slice tart apple.
In a medium mixing bowl, squeeze juice of one lemon and add apples slices. Toss until apples slices are coated with lemon juice. Sprinkle Watkins Ground Cinnamon and sugar on top of apple slices. Toss until coated.
Store in an airtight container or eat right away.