||Preheat oven to 170°C.
||Bring a heavy-based large saucepan to a medium heat and add 2 tbsp oil. Brown oxtail pieces all over in batches, removing to a plate until all pieces are finished.
||Place all meat back in the pan and add stock, tomato passata, spices and garlic and bring to a simmer.
||Cover in foil and place in oven for 3 and a half hours.
||Remove pot from oven, carefully remove the foil and lid ( there will be a lot of steam), remove the oxtail pieces and allow to cool slightly.
||Remove the meat from the bones, discarding bones. Return meat to pan along with beans, cover and set aside until beans are warmed and chilli is ready to serve. Serve with Garnishes of choice.