Preheat the oven to 425 degrees.
On a greased or lined sheet pan, arrange brussels sprouts, sweet potatoes, diced peppers, and chicken sausage evenly on the pan.
Spray with non-aerosol cooking spray or brush with olive oil and add your favorite seasoning.
Bake for 20 to 25 minutes, or until vegetables are tender, may toss lightly halfway through baking.