Time to allow: 1 hour Portions : 6 Ingredients Amount Type of raw ingredient Modern Substitutes 1 large roach   1 pint fish stock fish stock cube 12 button mushrooms   2 oz butter   3 small onions   1 bouquet garni   1 pinch nutmeg   to taste salt and pepper   Method   1 wash the fish in vinegar and water 2 cut into thick slices 3 slice the onions and fry until brown in the butter 4 peel the mushrooms 5 add the stock , mushrooms,herbs,nutmeg and seasoning 6 when warm add the fish and simmer for 30 - 40 minutes 7 take out the fish and keep warm 8 knead the flour and remaining butter to a smooth paste and add to the stewpan 9 simmer and stir until the sauce is cooked smoothly 10 place the fish onto a hot serving dish 11 strain the sauce over the fish and garnish with the mushrooms