Gluten Free French Toast Casserole

I made this for my wonderful wife for Mother's Day. It turned out really well and my wife enjoyed it.

Ingredients:
Main:
1- 12 ounce loaf Gluten-free Bread cut into 3/4 inch cubes
1- Apple, pealed and coarsely chopped
8 Eggs
3 Cups Milk (or milk substitute)
1/4 Cup Real Maple Syrup
1 teaspoon GF Vanilla Extract
3/4 teaspoon sea salt
1 teaspoon ground cinnamon

Topping:
3 Tbsp. Cold Butter, Diced
3 Tbsp. sugar
2 Teaspoons ground cinnamon
Maple Syrup

Directions:
1. Preheat oven to 350 degrees F.
2. Grease a 13 x 9 x 2 in baking dish.
3. Spread bread cubes in bottom of baking dish.
4. Sprinkle the chopped apples evenly across the top.
5. In a mixing bowl, beat the eggs.
6. Add the main ingredients to the eggs.
7. Beat until well blended.
8. Pour the egg mixture over the bread cubes.
9. In a small bowl, mix together the sugar and ground cinnamon from the topping ingredients.
10. Sprinkle cinnamon and sugar mixture over the top of the casserole.
11. Dot the top of the casserole with butter pieces.
12. Bake for 45-50 minutes or until a knife inserted near the middle comes out clean.
13. Remove from oven and let stand for 5 minutes before serving.
14. Serve with syrup on top and a side of fresh fruit.