In a small bowl, blend sour cream and brown sugar. Chill.
Place 6 French toast slices in the bottom of a greased 13x9-inch baking pan. Layer ham, 1 1/2 cups cheese and remaining 6 slices of French toast. Spread apple pie filling on top and sprinkle with granola.
Bake at 350ºF for 25 minutes. Top with remaining 1/2 cup cheese and bake 5 minutes or until cheese is melted.