HEAT oven to 375ºF.
TOSS chicken with seasoning mix until evenly coated.
HEAT dressing in large skillet on medium-high heat. Add chicken; cook and stir 5 min. or until evenly browned. Spoon into 1.5-L casserole dish; cover with layers of beans, corn, onions and salsa.
BAKE 20 min. Top with cheese; bake 5 min. or until melted. Serve over rice.