Season the ingredients. Preheat the oven to 400°F (200°C). Add the potatoes, sausage, onion, bell peppers, and green beans to a large mixing bowl. Add the olive oil, and Cajun seasoning, then toss to coat evenly.
Place on a sheet pan. Spread the seasoned ingredients out onto a sheet pan.
Cook it all together. Bake the sausage and vegetables for 30 minutes, or until the potato is soft when pierced with a fork, and the vegetables are roasted.
