Preheat oven to 450 degrees. Combine apples, sugar and cinnamon in a bowl. Place 3 to 4 tablespoons filling on each square. Fold into triangle, wet inside edges with a small amount of water. Press edges together and seal with a fork dipped into water. Make 3 slashes in each turnover so steam can escape. Place turnover about 2″ apart on a greased cookies sheet. Bake 15 minutes, reduce heat to 350 degrees and bake 15 minutes longer. NOTE: you can frost or glaze the turnover if you want a really sweet treat.