Overnight French Toast Casserole

French bread cut in 1 1/2 inch slices, enough to fill a 9x13 pan
2 cups whole milk
6 eggs
2 tsp vanilla
1/2 tsp cinnamon

Place bread in buttered pan. Mix remaining ingredients and pour over bread. Cover and refrigerate overnight. In the morning, carefully turn over the slices of bread and let soak while the oven heats to 350. Bake uncovered 20 minutes. Remove from oven, turn bread, and bake another 15-20 minutes or until tests done.

(Modified from this recipe)