Heat oven to 350. Spray a 10" bundt pan w/ cooking spray. In bowl, combine apples, 1/4 cup orange juice and cinnamon. In lg bowl, mix w/ beaters, the sugar and applesauce, beat 2 mins.
Add egg and egg whites. Slowly add 1/2 the flour, and the baking powder, milk, and 1/4 cup orang juice. Beat in remaining flour, beat in vanilla.
Pour 1/2 the batter into pan.Top w/ 1/2 the apple mix. Cover w/ remaining batter and then the remaining apple mix. Sprinkle w/ brown sugar. Bake about 1 hr, or until a toothpick inserted in center comes out clean.