Place a skillet over medium heat and add the sesame oil, garlic, and ginger. Add the mushrooms and cook and stir for 8 to 10 minutes, or until the mushrooms begin to caramelize. Add the soy sauce and then sprinkle with the sugar. Continue to cook for 3 to 5 minutes to dissolve the sugar. Add the red pepper flakes and serve.
Edited: October 15th, 2009