1 cup tomato ketchup
1/2 cup water
1/3 cup chopped onion
2 tablespoons granulated sugar
3 tablespoons cider or white distilled vinegar
2 tablespoons Worcestershire sauce
1-1/2 pounds ground beef
3/4 cup quick-cooking oats
1 cup evaporated milk
3 tablespoons chopped onions
1-1/2 teaspoons salt
1/4 teaspoon pepper
10 hamburger buns
Combine ketchup, water, chopped onion, sugar, vinegar, and Worcestershire sauce in a saucepan; simmer for 15 minutes.
Combine ground beef, oats, evaporated milk, chopped onion, salt, and pepper; mix well. Shape into patties about 3/4-inch thick. Cook over medium heat in a large skillet until browned, turning once.
Arrange the patties in a baking dish. Pour the ketchup mixture on top.
Bake at 350°F (175°C) for about 40 minutes. Serve with hamburger buns.
Makes 10 servings.