Combine the Marinade ingredients in a bowl and mix well. Pour equally into 2 bowls and place the beef strips in one and the mushroom in the other. Mix thoroughly and marinate the beef and mushrooms for at least 20 minutes.
Heat 1 tablespoon of oil in a nonstick skillet and sauté the beef over high heat for 2–3 minutes. Remove and drain on paper towels. Clean th