Preheat 350°F, put rack in the middle postion. Lightly grease an angel food pan. Bake for 30min. Cover with foil, bake another 90min. Uncover, bake for another 20min. Cool for 15min in pan. Cool cake completely on rack. Apple mixture:
In a medium bowl, combine apples, sugar, and cinnamon, and toss to coat evenly. Cake mixture:
In a small bowl, lightly whisk eggs, canola oil, orange juice, and vanilla extract.
In a very large bowl, sift flour, sugar, baking powder, salt, cinnamon, and nutmeg. Whisk together to thoroughly mix ingredients. Pour in egg mixture, blend together with hand mixer until smooth. Blend in milk and sour cream until smooth.
Combine apple mixture and batter together, and mix well. Pour apple batter into angel food pan. Sugar topping: