Cut bread into 1-inch cubes and add bread to a well-greased baking dish. (Stale bread works great too.)
1 (1 lb / 454 g) loaf of bread
Add eggs, milk and sour cream to a large bowl or blender, whisking well or blending on low until fully incorporated. Add vanilla, cinnamon and salt and continue mixing together until fully blended homogenously.
8 large eggs, 2 cups (480 ml) whole milk, ½ cup (120 g) sour cream, 1 tsp (5 ml) vanilla extract, ½ tbsp (4 g) ground cinnamon, ½ tsp (3 g) table salt
Pour egg mixture over bread cubes and make sure that all pieces of bread are in contact with the egg mixture; press down on bread with a large spoon as needed to coat.
Spread apple pie filling over bread evenly.
1 can (21 oz / 595 g) apple pie filling (this one is my favorite)
For the topping, in a separate bowl, combine flour, butter, brown sugar and cinnamon. Cut ingredients together until mixture is crumbly. (You can also use your hands to do this.)
1 cup (125 g) all-purpose flour, ½ cup (115 g) butter, ½ cup (100 g) light brown sugar, ½ tbsp (4 g) ground cinnamon
Spread topping evenly over the apple pie and bread mixture.
Cover pan and place in the fridge overnight or for at least 8 hours.
THE NEXT MORNING: Remove pan from refrigerator.
Place cold French toast bake in the oven and then turn oven on to 350 degrees. (Yes you are starting from cold.) Bake approximately 50-60 minutes. You are looking for the top to be golden brown and the middle to be firm. Bake in additional 5-minute increments until done, adding foil if the top appears to be done or browning too quickly.
Serve with jam or maple syrup if desired.