Cook 1/2 cup finely chopped onion in 1 tablespoon butter until tender. Add 2 cups finely chopped cooked ham, 3 slightly beaten eggs, 1 cup shredded sharp process American cheese, 2/3 cup fine cracker crumbs, 1 1/2 cups milk and dash of pepper. Mix well; turn into a 10 x 6 x 1 1/2 inch baking dish. Bake at 350 degrees for 45 to 50 minutes. Serves 6.