Simmer, covered, 4 pounds of pork back ribs, cut into pieces, in enough salted water to cover until nearly tender, about 1 hour.

Meanwhile, prepare sauce:

In a saucepan, melt 1 tablespoon butter; add 1 clove crushed garlic, and cook 4 to 5 minutes. Add 1/2 cup ketchup, 1/3 cup chili sauce, 2 tablespoons chopped onion, 1 tablespoon Worcestershire sauce, 1 tablespoon prepared mustard. Stir and bring to boil. Drain ribs; place in shallow pan; pour sauce over ribs. Bake at 350 degrees for 20 minutes. Baste often with sauce.