Adjust the oven rack to the upper-middle of the oven and preheat to 475
Cut all of your vegetables and place on a large sheet pan
To the veggies on the sheet pan, add 2 Tbs vegetable oil and then sprinkle on 1 teaspoon thyme, 1 teaspoon rosemary, ½ teaspoon red pepper flakes, all of the onion powder and garlic powder, 1 teaspoon kosher salt, 1 teaspoon pepper and 1 teaspoon sugar.
Using your hands, mix all of the spices, salt, oil and veggies together on the pan until everything is well coated
Arrange the veggies so that the brussel sprouts are in the middle with the cut side down
Dry the chicken pieces with a paper towel and lay them in the center of the baking sheet on top of the brussel sprouts with the skin side up and sprinkle the chicken evenly with ½ teaspoon salt and ½ teaspoon pepper.
Melt the butter in a coffee mug in the microwave. Once melted, Stir in as follows: ½ teaspoon salt, ½ teaspoon pepper, 1 teaspoon dried thyme, 1 teaspoon dried rosemary.
Using a Bar-B-Que brush, paint the chicken skins liberally with the butter mixture. If you have any left over, just pour it into the baking sheet pan.
Place in the baking sheet into the oven and bake at 475 for about 35 minutes. Use a meat thermometer to ensure that the chicken is cooked through. Dark meat should register 175. Breasts 160. When correct temp is reached, remove from the oven, transfer the chicken only to a serving platter, tent loosely with aluminum foil and rest for 5-10 minutes. When ready to serve, transfer the veggies to the platter with the chicken and toss the veggies in the pan juices.