2 tbsp vegetable oil
1 tsp chilli powder
1 tsp ground cumin
1 onion, finely chopped
3 cloves of garlic, finely chopped
2 small Ramiro peppers, finely sliced
1 beef tomatoes, roughly chopped
1 tbsp Dijon mustard
2 tsp smoked paprika
3 tbsp malt vinegar
3 tbsp tomato ketchup
a couple pinches of castor sugar
3 tbsp water
1 tbsp Worcester sauce
8 chicken thighs fillets, no skin or bones
2 tbsp arrowroot
salt and freshly ground black pepper