Ingredients
1 large onion, finely chopped
1 tbsp oil
2 cloves garlic, very finely chopped
1 tbsp tomato purée
400g tinned chopped tomatoes
250g chutney
2 tbsp Worcestershire sauce
2 tbsp brown sugar
2 tbsp vinegar
½ tsp chilli flakes
60ml coke
Salt
White pepper

Method
In a large heavy based pot heat the oil over a medium heat and cook for the onion for 5-7 minutes until soft and translucent.  Add the garlic and cook for a further minute.  Add the tomato puree and cook for a further minute, stirring the whole time.

Add all the other ingredients and simmer for 15 minutes, stirring fairly often to make sure it doesn't burn.

Taste the sauce to check the seasoning and spice level, if you want it to have more bite to it, add a little bit more chilli.

The sauce is now ready to serve.