First, rinse them off, and dry with a paper towel to remove excess dirt. Then, chop off the bottom of the stem. Place mushroom on its side, and cut into thin slices. Repeat for the rest of your mushrooms, then sautée in a tablespoon of oil in a medium frying pan on medium heat. When juices release, add a tablespoon of soy sauce, and cook for 1-2 minutes until juices reabsorb.