Place vegetables and sausage on a large sheet pan lined with parchment for easy clean up. Drizzle with olive oil and sprinkle on garlic powder, onion powder, salt and pepper. Stir with hands to combine.
Bake for 15 minutes, stir, then bake for an additional 15 minutes or until vegetables are cooked through.
Total cooking time 30-45 minutes.
Serve immediately.