Apple barbecue sauce

2 Braeburn apples, peeled and 2cm diced

2 large onions, finely diced

4 garlic cloves, finely chopped

1/2 tsp chilli flakes

100g of brown sugar, dark soft

100ml of soy sauce

300ml of tomato ketchup

150ml of chicken stock

4 tbsp of cider vinegar

50ml of extra virgin rapeseed oil