HEAT oven to 350°F.
COMBINE first 4 ingredients; reserve for later use.
Cook chicken in large ovenproof skillet sprayed with cooking spray on medium heat 5 min. or until evenly browned, turning after 3 min.
Remove chicken from skillet; cover to keep warm.
ADD bok choy, yellow onions and peppers to skillet; cook on medium-high heat 3 min., stirring frequently.
Stir in ginger; cook 30 sec.
Return chicken to skillet.
Add reserved dressing mixture; cover.
BAKE 25 min. or until chicken is done (165ºF).
Serve over rice, topped with green onions and nuts.