Sweet and Savory Ribs

1 large onion, chopped
2-1/2 to 3 pounds boneless country-style pork ribs
1 bottle (18 ounces) honey barbecue sauce
1/3 cup maple syrup
1/4 cup spicy brown mustard
1/2 teaspoon salt
1/4 teaspoon pepper

Place onion in a 5-qt. slow cooker. Top with the ribs. Combine the barbecue sauce, syrup, mustard, salt and pepper; pour over ribs. Cover and cook on low for 8-9 hours or until the meat is tender. Makes 6-8 servings.