Preheat the oven to 400℉
Spray a baking sheet with avocado oil
Peel and dice the sweet potatoes and half the brussels sprouts then add them to the tray with the walnuts
Spray the veggies with avocado oil then season with salt, cinnamon and maple syrup
Cook the veggies in the oven for 35-40 minutes
For the chicken thighs, place them in a glass baking dish. In a small bowl, combine the dijon mustard and maple syrup then brush it over the chicken. Season with salt
Cook the chicken in the oven for 25-30 minutes or until it reaches an internal temperature of 165℉