The Book of Household Management by Mrs. Beeton

159. INGREDIENTS.--7 oz. of carrot, 10 oz. of parsnip, 10 oz. of potato,

cut into thin slices; 1-1/4 oz. of butter, 5 teaspoonfuls of flour, a teaspoonful of made mustard, salt and pepper to taste, the yolks of 2 eggs, rather more than 2 quarts of water. _Mode_.--Boil the vegetables in the water 2-1/2 hours; stir them often, and if the water boils away too quickly, add more, as there should be 2 quarts of soup when done. Mix up in a basin the butter and flour, mustard, salt, and pepper, with a teacupful of cold water; stir in the soup, and boil 10 minutes. Have ready the yolks of the eggs in the tureen; pour on, stir well, and serve. _Time_.--3 hours. _Average cost_, 4d. per quart. _Seasonable_ in winter. _Sufficient_ for 8 persons. II.