Marmalade French Toast Casserole

3 T butter
1 16 oz sourdough french bread loaf cut into 24 1/2 inch slices
1 12 oz jar orange marmalade
2 3/4 cups milk
1/3 cup sugar
1 t vanilla extract
1/4 t ground nutmeg
6 large eggs
1/2 cup chopped walnuts

Spread softened butter on one side of each bread slice. Arrange 12 bread slices, buttered side down, slightly overlapping in a single layer in a 12 x 9 baking dish coated with cooking spray. Spread marmalade evenly over bread, top with remaining 12 bread slices buttered side up. Combine milk, sugar, vanilla, nutmeg and eggs stirring with a wish. Pour egg mixture over bread. Cover and refrig overnight. Cook 350 45 min. Serve with honey or syrup