It's an annual tradition that we make this meal the day after Thanksgiving. I can't remember a year where I didn't have this.
Ham Au Gratin:
4 T margarine or butter 5 T all-purpose flour 2 1/2 cups milk 1/2 teaspoon salt 1/4 teaspoon pepper 2 cups grated cheddar cheese 2 cups chopped ham 2 T chopped onion 4 medium potatoes, cooked, peeled and sliced
Melt butter over heat. Add flour, salt, pepper and stir. Remove from heat. Whisk in milk until mixture is smooth. Return to heat and cook until mixture thickens. Add 1 1/2 cups cheese. Stir until smooth and melted. Grease a 13x9 casserole dish. Alternate layers of potatoes, onions and ham. Pour cheese sauce over the top. Bake at 350 for 30 minutes. Remove and sprinkle top with remaining cheese. Return to oven until new cheese is melted.