COMBINE meat, dressing, soy sauce, 2 tsp. ginger and half the garlic; set aside.
HEAT large nonstick skillet on high heat. Add bok choy, peppers, remaining ginger and garlic; stir-fry 1 min. Stir in broth; cover. Cook 3 to 5 min. or until vegetables are crisp-tender. Transfer to platter; cover to keep warm.
ADD meat mixture to skillet; stir-fry on high heat 3 to 4 min. or until meat is done. Spoon over vegetables.