Spray PAM in a large deep sided baking dish. Place a layer of bread in the bottom of the dish and brush tops of bread with 1/2 of melted butter. Top with smoked gouda cheese. Repeat bread, butter and cheese layers (using cheddar to top second layer of bread).
In a separate bowl mix eggs, salt, mustard and pepper together. Add half & half and whipping cream. Stir well to let salt dissolve. Pour over bread and cheese layers. Bake in oven at 350 degrees for 20 - 30 minutes or until egg mixture is set. You may need to cover with aluminum foil to avoid over browning.