Very often you will find that you cannot use all your lettuces, that they have begun to bolt and are no good for salad. This is the moment to cook them. Discard any bad leaves and wash the others carefully. Boil them for twelve minutes, take them off the fire, drain them and dry them in a clean cloth so as to get rid of all the water. Mince them finely, then put them into a saucepan with a lump of butter, pepper and salt. Stir till they begin to turn color, then put in a thimbleful of flour melted in milk. Stir constantly, and if the vegetable becomes dry, moisten with more flour and milk. Let it simmer for quarter of an hour, and turn it out as a vegetable with meat.