Place in a mold with brown stock or meat gravy (in that case use a mold with a hole) and cook in double boiler.
Choose middle-sized mushrooms, which are also of the right ripeness: when they are too big they are too soft and if small they are too hard.
Scrape the stems, wash them carefully but do not keep in water, for then they would lose their pleasant odor. Then cut them in rather large slices and dip them in flour before putting in the frying pan. Olive oil is best for frying mushrooms and the seasoning is composed exclusively of salt and pepper to be applied when they are frying. They can also be dipped in beaten eggs after being sprinkled with flour, but this is superfluous.
For a stew the mushrooms ought to be below middle-size. Clean, wash and cut as for the preceding. Put a saucepan on the fire with olive oil, one or two cloves of oil and some mint leaves. When the oil begins to splutter, put the mushrooms in without dipping in flour, season with salt and pepper and when they are half cooked pour in some tomato sauce. Be sparing however, with the seasoning, in order that the mushrooms do not absorb it too much and so lose some of their own delicate flavor.
Mushrooms are an excellent condiment of various dishes and for this reason it is well to have some always at hand. Since, however, it is not always possible to have them fresh, the following recipe to prepare dried mushrooms will be found useful.
First of all wait until there is a sunny day. Choose young mushrooms middle sized or big, but not too soft. Scrape the stem, clean them well in order to remove the earth and, without washing cut them in big pieces. This because when dried they diminish considerably in size. Keep these pieces exposed in the sun for two or three days, then thread them on a string (practising a hole in them) and keep in a well ventilated room or in the sun until they become quite dry. Then put them away well closed in a paper bag, but don't fail to look at them from time to time to see if it is necessary to expose them some more to sun and ventilation.
To use them soften in warm water, but keep them in as little as possible, so that they do not lose their delicate flavor. The best time to dry the mushrooms is June or July.