Homemade BBQ Sauce

Ingredients
Olive oil
1 small onion, peeled and finely diced
2-3 garlic cloves, finely chopped
1 tbsp brown sugar
1 tsp smoked paprika
1 tbsp cider vinegar
2 tsp Worcestershire Sauce
6 tbsp tomato ketchup

Instructions
1. Heat the oil in a frying pan, add the onion and garlic with some seasoning and the sugar. Fry for 5 minutes until softened. Add the paprika and stir to combine. Cook for 10-15 minutes until the onion is caramelising, then add the vinegar and let it cook for a couple of minutes.
2. Add the Worcestershire sauce and tomato ketchup, mix well and continue to cook for about 8 minutes until the sauce has reduced. Taste and add the seasoning as necessary. Remove from the heat and set aside. 

Taken from Gordon Ramsay's Ultimate Cookery Course