Barbecue sauce

Ingredients

• 15g groundnut or grapeseed oil
• 3 cloves of garlic, peeled and finely chopped
• 1 banana shallot, peeled and finely chopped
• ¼ tsp ground ginger
• ¼ tsp powdered allspice
• ¼ tsp mustard powder
• ¼ tsp cayenne pepper
• ¼ tsp smoked paprika
• 210g tomato passata
• 100g cider vinegar
• 120g demerara sugar
• 1 tbsp worcestershire sauce
• 1 tbsp golden syrup
• ½ tsp salt
• ¼ tsp black pepper