This make-ahead breakfast bake transforms stale bread into a rich, custardy, and spiced delight. Prepare it the night before for a relaxed morning where your house fills with the aroma of cinnamon and baked vanilla. It's the ultimate comfort food centerpiece for a crowd, requiring minimal active effort.
Using stale, dry bread is crucial to prevent a mushy texture. If bread is fresh, cube it and leave out to dry for a few hours. For a blueberry version, gently toss 1 1/2 cups of fresh or frozen berries with the bread cubes before adding the custard. Leftovers can be refrigerated for up to 3 days and reheated.