1 carrot1 onion4 stalks of celery4 tomatoes, skinned & seeded1 potato, peeled8 ounces of navy beans, soaked overnight2 ounces of olive oil2 ounces of butter1 and 1⁄4 teaspoons of paprika2 quarts of chicken stock3 tablespoons of tomato paste2 mild chouriço sausages1 teaspoon of cayenne pepperSalt & pepper (to taste)