1 pound fish fillet (fresh or frozen) – eg. half salmon, half cod 1 clove garlic 2 medium potatoes 2 carrots 1 leek 3 tbsp butter 5 tbsp flour 4 and 1/4 cups fish stock 1 cup milk 1 and 1/4 cup crème fraîche (or sour cream) 1 cup shrimp, peeled and cooked (optional) 1…