Preheat oven to 375 degrees. And spray a baking sheet with cooking spray.
Dice sweet potatoes into bite sized pieces.
Add broccoli and sweet potatoes to the baking sheet. Spread olive oil, and a little salt over the broccoli and sweet potatoes.
Bake for 30 minutes or until vegetables are roasted
Dry chicken breasts with paper towels and place on the baking sheet (This will help the seasoning stick to the chicken.)
Sprinkle McCormick seasoning over the chicken breasts and bake for an additional 15-20 minutes, or chicken is cooked throughly and there is no pink.
Serve just like this or over rice and enjoy!