This is a very interesting mushroom, has a thick and very meaty stem and the cap is kind of small compared as a whole. After cooking the texture of this mushroom is different from the others species of mushroom.
Wash the mushroom and remove the bottom part, where the mushrooms attached to the soil (brown and flaky). Slice it approximately ½ inch and boil in water for 2~3 minutes. Drain it and reserve.
In a pan sautee the garlic in butter until brown, add the sliced onion, let it cook for 1 minute, add the mushrooms, soy sauce, salt and pepper to your taste. Stir gently, until well distributed.
Finally, add the chopped cilantro and serve hot.