This Heavenly Berry French Toast Bake is a delightful breakfast casserole featuring challah or brioche bread soaked in a rich egg custard and topped with fresh mixed berries and a crunchy pecan streusel. Perfect for a weekend brunch or special occasion, it's easy to prepare ahead of time.
For best results, prepare the French toast bake the night before and let it chill in the refrigerator overnight. This allows the bread to fully absorb the custard, resulting in a more flavorful and tender bake. You can also vary the berries used based on seasonal availability or personal preference. If you don't have challah or brioche, a sturdy white bread or sourdough can be used, although the texture might be slightly different. Adjust baking time as needed based on your oven and the thickness of the bread cubes.