Baked French Toast Casserole

Step 1
Generously butter a 9x13-inch baking dish.

Step 2
Whisk eggs, half-and-half, milk, white sugar, vanilla extract, 1 teaspoon cinnamon, 1 teaspoon nutmeg, and salt together in a bowl. Dip each bread slice into egg mixture and arrange in overlapping rows in the prepared baking dish. Cover dish with plastic wrap and refrigerate, 8 hours to overnight.

Step 3
Preheat oven to 350 degrees F (175 degrees C).

Step 4
Mix pecans, brown sugar, butter, corn syrup, 1 teaspoon cinnamon, and 1 teaspoon nutmeg together in a bowl; spread evenly over bread in the baking dish.

Step 5
Bake in the preheated oven until cooked through and golden brown, about 45 minutes. Generously top French toast with confectioners' sugar.