Preheat the oven to 400°. In a 9x13 baking dish add the chicken thighs to one side and the veggies to the other, in a small bowl add the maple syrup, Dijon mustard, brown sugar, apple cider vinegar, onion powder and garlic powder and stir.
Pour all over the chicken and veggies and stir and toss the chicken around to get coated. Place the dish in the oven and cook for 35-45 minutes or until the chicken is completely cooked through.
Make sure to baste the chicken and stir the veggies every 10 minutes with the juice on the bottom of the pan. Broil the chicken the last 5 minutes of its baking time to brown and color the tops.
(OPTIONAL) If you'd like to make a gravy with this, take a large skillet and place it over a medium high heat, add 2 tbsp of butter and melt, add two tbsp of flour and whisk together. Pour all the juices from the bottom of the baking dish into the pan carefully and stir. Once it becomes thick remove from heat. Serve and enjoy!