Preheat oven to 425F degrees.
Toss all the vegetable in a large bowl with olive oil and half the amount of salt, garlic powder and onion powder called for. Place on a baking sheet.
In the same bowl you used for the vegetables add the chicken breasts and toss with olive oil and the remaining seasonings. Add to the sheet pan with the vegetables and roast for 30 minutes, or until the chicken is cooked through.