Heat the oil in a pan over medium heat and fry the slices of sausage until they are cooked through. This takes about 8 minutes. Remove the pan from the heat and set aside.
Lower the heat and remove the brown pieces. Add the leek rings, garlic and thyme and cook until everything is soft. This takes about 6 minutes. Season with pepper and salt.
Add the paprika powder and the bay leaf and stir well until all the herbs mix. Continue to cook for 1 min.
Add the tomatoes, the stock and the wine and bring to a boil. Reduce the heat and simmer for 5 minutes. Remove the bay leaf and thyme and discard them.
Add the clams and cook until they open up. This takes about 8 to 10 minutes. Stir frequently.