Preheat the oven to 400 degrees. Cut the chicken sausage and butternut squash into bite-sized pieces; quarter the Brussels sprouts. Transfer the chicken sausage, butternut squash and Brussels sprouts to a large bowl and toss with olive oil and salt and pepper. Spray a rimmed baking sheet with cooking spray and spread the mixture onto the baking sheet. Cook for 20 minutes. Meanwhile, prepare the brown rice, if desired. Place the brown rice in a bowl and top with the sausage and vegetable mixture. Drizzle with balsamic glaze, if desired, before serving. Enjoy!