Lighter Overnight French Toast Casserole

Ingredients

• maple syrup, for topping
• 1/3 cup maple syrup
• 4 eggs
• icing sugar, for topping
• 1 loaf bread
• 1/3 cup butter, melted
• 1 1/2 cups milk
• 1/2 tsp cinnamon
• 1 cup frozen mixed berries
• 1 cup fresh berries, for topping