PREHEAT oven to 350°F. Spray large nonstick ovenproof skillet with cooking spray. Heat on medium-high heat. Add chicken; cook 4 minutes on each side or until lightly browned on both sides. Remove from heat. Add vegetables to chicken in skillet; stir gently. Set aside. ADD milk to flour in deep
Arrange chicken breasts in baking pan. Pour soup mix over the breasts. Arrange Monterey Jack cheese slices over the chicken. Sprinkle with 1 cup dry stuffing mix. Drizzle 1/2 cup melted butter on top. Bake at 350 degrees for 55 to 60 minutes. Do not cover.