This is the easiest and best method of treating any number of mushrooms whose native flavors tend to be a bit flat, such as the milk caps (Lactarius deliciosus or L. sanguifluus), spreading hedgehog mushrooms (Dentinum repandum—known as pieds de mouton in France), or trumpets of death (Craterellus cornucopioides). Cultivated mushrooms are often prepared in this way also and, despite a more alluring personality, chanterelles (Cantharellus cibarius) are most commonly treated this way. They, unlike the others, must first be disgorged of their excess liquid before being sautéed.
The garlic is usually finely chopped, but its presence will be more discreet if it is pureed and mixed with the chopped parsley.
If, after carefully trimming the earthy stem ends, it is possible to wipe the mushrooms clean, do so—otherwise, plunge them into a large basin of cold water, swirl them around vigorously with your hands, and remove them immediately to a colander, lifting them with both hands, fingers splayed. Sponge them gently dry in a towel.