Jamie Kennedy's Slow-cooked ribs with sweet and sour sauce

Ingredients

• 2 398-mL cans tomato sauce
• 1 cup orange juice
• 1 onion , finely chopped
• 1 celery stalk , finely chopped
• 1/4 cup cider vinegar
• 3 tbsp maple syrup or honey
• 2 tbsp chopped fresh ginger
• 3 kg back or side pork ribs
• 1 whole head garlic
• 2 jalapenos , finely chopped
• 3 tbsp vegetable oil
• 2 tbsp paprika
• 1 tbsp salt