100 grams (3.5 oz) butter 1 medium onion 1 tablespoon flour (or substitute with arrowroot if gluten free) 1 cup fish stock 1 cup milk 1 cup sweetcorn 1 medium
potato, diced into small cubes 2 tins smoked herring fillets (or equivalent amount of smoked fish) 2 - 3 cups mixed seafood of your choice (I
usually use a small tin of salmon, some shrimp meat and bay
scallops) 1/2 cup cream Salt and pepper (to taste)