Preheat the oven to 425.
In a large baking dish, toss the broccoli, garlic, onion, cherry tomatoes, and mushrooms with olive oil and season with salt and pepper. Shake dish a bit to spread everything evenly in a single layer.
Nestle the chicken sausage into the vegetables.
Bake for 15-18 minutes, carefully toss everything.
Bake for another 15 to 20 minutes until veggies are roasted and sausage is cooked through.
Meanwhile, cook pasta according to directions in a large pot of salted water until al dente.
Remove the roasting veggies from the oven. Place the sausage on a platter to rest.
Toss pasta with sauce and add in the roasted veggies. Slice the sausage and stir in as well.