Sloppy Joes

3 pounds ground beef
1 teaspoon salt
1 cup chopped onion
1 cup ketchup
1 (10 3/4 ounce) can tomato soup
2 tablespoons vinegar
2 tablespoons Worcestershire sauce
2 tablespoons packed brown sugar
12 hamburger buns

In a large skillet brown ground beef. Drain fat. Sprinkle with salt. Add chopped onion and cook until tender. Stir in ketchup, tomato soup, vinegar, Worcestershire sauce, and brown sugar. Simmer for about 30 minutes. Spoon into hamburger buns and serve. Makes 12 servings.