Tear the cleaned mushrooms into pieces using the instructions above. Heat the olive oil in a 10" fry pan. When a small drop of water in the oil sizzles, add the mushrooms and stir. It might seem at first that the mushrooms are going to stick. Give them another stir, turn down the heat to medium-high, and wait. The mushrooms will release a lot of moisture. When you notice the liquid in the pan is decreasing, drain the liquid into a dish and set aside. You can use this liquid later for mushroom gravy.