Preheat the oven to 180C
Begin by putting a large casserole dish on medium heat with oil then add sausages and cook for 5-10 minutes until golden on the outside.
Remove the sausages from the pan and set aside.
Return the pan to the heat with onion, garlic, leeks, swede, smoked paprika, cumin seeds and some salt and pepper.
Cook for around 5 minutes, before adding the chopped tomatoes, peppers, tomato puree, vinegar and 300ml vegetable stock.
Transfer the dish to the oven for 20-25 minutes until the sauce is thick and the swede is cooked through. Add the sausages and cook for a further 5 minutes to heat through.