Preheat oven to 450°F. Mix Seasoning Mix and panko in shallow dish until well blended. Place broccoli in large bowl. Add 2 tablespoons of the oil; toss to coat. Sprinkle with 3 tablespoons of the panko mixture; toss until evenly coated. Place broccoli on one side of a foil-lined shallow baking pan sprayed with no stick cooking spray.
Brush chicken with remaining 1 tablespoon oil. Coat evenly on both sides with remaining panko mixture. Discard any remaining panko mixture. Place chicken on other side of baking pan.
Bake 12 minutes. Sprinkle cheese evenly over broccoli. Bake 3 minutes longer or until chicken is cooked through and cheese is melted.