Preheat oven to 425 degrees. Cut up the veggies and sausage.
Add everything to a large bowl and add the olive oil, spices, and parmesan. Mix well making sure everything is VERY well coated with olive oil. This is very important.
Bake in the oven for about 17-22 minutes flipping everything halfway through. Once sausage starts to slightly brown and peppers and onions are soft.