How do You Make Bbq Sauce?

How to make bbq sauce:1 small onion, chopped,3 cloves crushed garlic,1 tsp olive oil,1 red chilli, finely chopped,1 tsp fennel seeds, crushed,55g/2oz dark brown sugar,50ml/1’fl oz dark soy sauce,300ml/10fl oz tomato ketchup,salt and pepper.Fry the onion and garlic in olive oil with the chilli, fennel seeds and sugar. Add the soy sauce and ketchup and season with salt and pepper. Bring to the boil and simmer for a few minutes to combine the flavours.