Onion Sauce.—Parboil the onions in water, strain them off, cover them with milk, and let them boil gently half an hour, strain the milk off, chop the onions fine, put half an ounce of butter into the saucepan, when melted stir smoothly in half an once of flour, add by degrees the milk, stir it till it thickens, then add the onions, and let it boil up.