This Overnight Blueberry French Toast Bake is a deliciously indulgent breakfast casserole perfect for busy mornings. Cubes of day-old bread are combined with cream cheese and fresh blueberries, soaked overnight in a rich mixture of eggs, milk, cinnamon, vanilla, and maple syrup. The next day, it bakes to a golden, custardy perfection and is served with a warm, homemade blueberry sauce that adds a sweet and tangy finish. It's a crowd-pleasing dish ideal for family breakfasts or brunch gatherings.