3-4 tbsp butter 2 small onion – finely sliced ½ leek – finely sliced 3 tomatoes – chopped into very small pieces 2 small stalks celery, finely sliced 1.5 liters chicken or vegetable stock/ 6 cups 200 ml cream/ 4/5 cups (you can add less if you wish, or none) 100 ml/ ½ cup sherry or port or Noilly Prat 3 tbsp tomato concentrate ½ tsp saffron powder (optional) 3-4 tbsp wine vinegar 160 ml/ ¾ cup dry white wine 400 g/ 4 cups small shrimps (without shells) 500 g/ 5 cups mixed nordic fish – salmon, haddock, plaice, halibut – cubed Salt and pepper to taste