1. In a large mixing bowl, blend together sugar, butter and egg. Beat until thoroughly blended. 2. Sift flour, baking powder and salt together. 3. Stir milk into sugar-butter-egg mixture. 4. Add dry ingredients to milk mixture and stir until thoroughly blended. 5. Spread batter into an 8-inch square, heat resistant, non- metallic baking dish. 6. Arrange apple slices in a design on top, pressing them slightly into the batter. 7. Combine cinnamon and sugar in a small bowl and sprinkle on top of apple slices. 8. Heat, covered with clear plastic wrap, 5 minutes in Microwave Oven. Uncover and heat an additional 4 minutes or until apples are tender and a toothpick inserted in center comes out clean. 9. Allow to stand 10 minutes before serving.