Apple Overnight French Toast Casserole

Ingredients (9)

• 1 cup brown sugar
• 1/2 cup (1 stick) butter
• 2 Tablespoons bourbon (optional)
• 3 apples (I used Honeycrisp), cored, peeled, and sliced thin
• 6-8 thick slices day old bread (I recommend challah or brioche)
• 4 eggs
• 1 cup milk
• 1 Tablespoon vanilla extract
• 1 1/2 teaspoons cinnamon