Melt the butter in a large skillet (mine is nonstick) over low heat. Peel the garlic and crush it with the flat side of your knife, then slice it into strips. Add to the butter and cook over LOW HEAT for about 2 minutes. (It should not brown. If it does, the heat is too high.)Wash the mushrooms and slice them into â…›-1/4 inch slices. Add to skillet, and stir to coat with butter, then spread out. Cook undisturbed for 5 minutes. Stir and cook 5 minutes more.After 10 minutes, the mushrooms should be much smaller and starting to get brown. Increase the heat to about medium-low and cook for about 5 minutes to brown the mushrooms.Finally, add a splash of soy sauce (about 2 teaspoons), and a little sprinkle of salt (if desired). Stir well and cook for just another 30-60 seconds. Taste and adjust seasoning as necessary. Remove from heat and serve.