Overnight Apple Pie French Toast Casserole

INGREDIENTS

or so) loaf of day-old french or sourdough bread (about 16 slices)

large eggs

1 1/3 cups

milk

1 tsp

vanilla extract

1/4 cup

granulated sugar

1 tsp

cinnamon

(approximately 21 ounce) can of apple pie filling (see note)

1 cup

all purpose flour

1/2 cup

packed brown sugar

1/2 cup

unsalted butter, softened

1 cup

quick cooking oats