2 lb. spare ribs, pre-cooked
3/4 c. pure maple syrup
1/4 c. chili sauce
1/2 c. onion, chopped
1 tbsp. vinegar
1 tbsp. Worcestershire sauce
1 clove garlic, finely chopped

Combine all ingredients except ribs, pour over ribs.

Refrigerate at least 4 hours, turning occasionally. Grill or broil as desired, basing frequently with sauce.