Overnight Baked French Toast Casserole

Ingredients

• ½ cup all-purpose flour
• ¼ cup granulated sugar
• ¼ tsp fine sea salt
• 1 TBS pure vanilla extract
• ½ cup salted butter
• 1 tsp ground cinnamon
• 1 ½ cups whole milk
• 1 loaf French bread
• 8 large eggs
• ½ cup brown sugar
• 1 cup half and half