1 rack pork ribs, cut into individual ribs, about 3 pounds
1/3 cup cider vinegar
3 tablespoons spicy brown mustard
2 tablespoons brown sugar
3 tablespoons water
1 teaspoon onion powder
1/4 teaspoon hot sauce
1. Heat over to 400 degrees. Place ribs in a 13 x 9 x 2-inch baking dish and cover tightly with foil. Bake for 1 hour. Drain off any accumulated liquid.
2. Meanwhile, in a medium-size saucepan, stir together the ketchup, vinegar, mustard, brown sugar, 3 tablespoons water, the onion powder and hot sauce. Cook over medium-low heat for 10 minutes, stirring. Place half the sauce in a small bowl; set aside.
3. Heat gas grill to medium-high or prepare charcoal grill with medium-hot coals. Lightly coat grill rack with oil or nonstick cooking spray.
4. Baste ribs generously with the remaining sauce and grill for 3 to 4 minutes per side or until nicely browned. Serve ribs with reserved sauce on the side.
Do ahead tip: Bake ribs and make sauce; allow both to cool to room temperature. Cover and refrigerate for up to 2 days. Gently reheat ribs and sauce before grilling.