Golden Baked Onion Casserole

½ C butter

6 medium onions, sliced

1 10-3/4 oz. cream of chicken soup

1 C milk

Salt and freshly ground pepper

¾ lb. Gruyere or Swiss cheese

French bread slices

Melted butter

Preheat oven to 350 degrees. Butter shallow oval baking dish. Melt ½ cup butter in large skillet over medium heat. Add onions. Cook until tender (about 15 minutes). Put onion in buttered casserole. Combine soup, milk, salt and pepper and pour over onions. Sprinkle with grated cheese. Dip bread slices in melted butter on one side. Arrange over onion mixture with buttered side up to cover all onion mixture. Bake until bread is browned, about 30 minutes. Serve hot.