Easy Oven Barbecued Spareribs
["2 to 4 lb. meaty spareribs", "2 sliced onions", "2 Tbsp. vinegar", "2 Tbsp. Worcestershire sauce", "1 tsp. salt", "1/2 tsp. red pepper", "1 tsp. paprika", "3/4 c. ketchup", "1/2 tsp. black pepper", "1 tsp. chili powder", "3/4 c. water"]
["Divide ribs into serving pieces and place in roasting pan. Lay onions on top and pour over them sauce made from remaining ingredients. Cover and bake 1 1/2 hours in moderate oven or until tender. Remove cover for the last 20 minutes and allow to brown."]
["meaty spareribs", "onions", "vinegar", "Worcestershire sauce", "salt", "red pepper", "paprika", "ketchup", "black pepper", "chili powder", "water"]