Spicy Chorizo & Mussel Stew

1 Tbsp Olive Oil
1 White Onion, thinly sliced
2 Cloves Garlic, thinly sliced
2 Chorizo Sausages, cubed
White Wine
1 Tin Tomatoes
1 Tbsp Chilpotle Paste (see recipe)
1/2 Pint Chicken Stock
1lb Mussels

Heat the oil in a caserole dish and add the onions. Stir for a minute or two then add the garlic and the chorizo. Stir until the chorizo has cooked through. Splash in a little white wine to deglaze then add the chicken stock. Open the tin of tomatoes and wave a knief around inside to chop them, then add them to the caserole along with the chilpotle paste. Season to taste. Leave this to simmer while you debeard and clean the mussels. Steam the mussels in a little white wine for two minutes in a separate pan, then remove the mussels from their shells and add them to the stew.