Preheat oven to 350°F. In large bowl, beat eggs with milk, butter and vanilla. In separate bowl, combine flour, sugar, baking powder and cinnamon. Add to egg mixture; stir just until moistened. (Do not overmix.) Stir in apples. Pour into prepared pan 1/2 - 2/3 full. Bake 18-20 minutes or until toothpick inserted in center comes out clean. Cool in pan on cooling grid 5 minutes; remove from pan and cool completely.