Cheddar Apple Breakfast Lasagna

1 cup sour cream
1/2 cup brown sugar
2 (9 ounce) packages frozen French toast (or 12 slices homemade)
8 ounces sliced, boiled ham
2 1/2 cups shredded Cheddar, divided
1 (20 ounce) can apple pie filling
1 cup granola with raisins

Grease a 9x13 inch baking pan. In a small bowl blend together the sour cream and sugar. Chill. Prepare the French toast according to the package directions and place 6 slices in the bottom of the prepared pan. Top with a layer of the ham, 2 cups of cheese, and the remaining French toast. Spread the pie filling over the toast and sprinkle with the granola. Bake in a 350 oven for 25 minutes. Top with the remaining 1/2 cup of cheese and return to the oven until the cheese melts. Serve with the sour cream mixture.