Directions:

• Preheat the oven to 250°F (120°C).
• Remove the membrane from the back of the ribs and season with 1½ tbsp (22 mL) of the rub. Wrap the ribs individually in foil and bake for 2½ hours.
• Before the ribs have finished baking, preheat the grill to medium heat (about 350°F/180°C).
• Combine the ketchup, vinegar, and remaining rub.
• Remove the ribs from the foil and transfer to the grill, meat-side up. Brush the ribs with sauce and cook, with the grill closed, for 20 minutes. Flip and brush the bone-side of the ribs with sauce and cook, with the grill closed, for 10 minutes.
• Cut into 2 bone portions and serve with additional sauce.