Tomato Purée

Six smallish tomatoes. Cut them into slices and place them in an enamelled saucepan, add 1 oz. of butter, a teaspoonful of chopped parsley, salt, pepper, and a tiny pinch of cayenne. Pour over one pint of stock. Boil until quite soft, and then pass through a sieve, add 1 oz. of anchovy essence, thicken with ½ oz. of butter and ½ oz. of flour previously mixed together in another pan with some of the tomato mixture. Stir over the fire until the sauce thickens, and it is then ready for use.