In a reusable container or bag, coat chicken with 2 Tbsp oil and 3 Tbsp seasoning. Toss well to coat. Let sit in refrigerator 20-30 minutes to create a nice glaze.
Heat oven to 400 ° F. Line a large sheet pan with foil and coat lightly with oil or non-stick spray. Arrange chicken in the center of a large sheet pan. Bake for 25 minutes.
Toss green beans and carrots with 2-3 Tbsp oil and 2 Tbsp seasoning. Carefully remove pan from oven and add veggies around the edges.
Return to oven and roast until veggies are tender and chicken is cooked through and golden brown - appx 20-25 minutes more. (An internal thermometer should read 165 ° F).