1 1/2 c. maple syrup
2 tbsp. cider vinegar
1 tsp. salt
1/2 tsp. dry mustard
3 lbs. spare ribs
2 tbsp. chili sauce
2 tbsp. finely chopped onion
1/8 tsp. pepper

Preheat oven to 350 degrees. Wipe spareribs with damp towel and cut into serving-size pieces. Place ribs in single layers on rack in shallow roasting pan, brushing both sides with sauce. Roast 1 1/2 hours or until tender, brushing frequently with sauce and turning occasionally to glaze evenly.