These tender, juicy spareribs are deliciously tangy and a snap to prepare. They are baked with a combination of pineapple, ketchup, vinegar, sugar, soy sauce, and other seasonings for a terrific sweet-and-sour flavor with an asian flair. The ribs are great for a game-day party or a sit-down dinner. And, if you prepare this recipe using rib tips, instead of spareribs, they make a tasty appetizer that can be kept warm in a slow cooker.