Rub flank steak with Asian Essence. Let marinate for 1 hour or refrigerate overnight.
Preheat grill or broiler. Grill or broil steak on both sides for 6 minutes. Remove and allow to rest for 10 minutes.
Cover the mushrooms with 1 cup warm water and soak for 20 minutes. Reserve the liquid, discard the stems, and slice the caps into strips.
Heat wok with 2 tablespoons oil. Stir-fry garlic ginger, onion and mushrooms for 1 minute, then add the remaining vegetables. Stir-fry for 4 to 5 minutes or until tender.
Add soy sauce, mushroom water, and cornstarch. Cook until slightly thickened. Drizzle with dark sesame oil, and season with salt.
Place Stir Fried Vegetables on platter. Thinly slice steak against the grain and fan over vegetables. Drizzle with Shiitake Barbecue Sauce.
Yield: 4 servings