In a large mixing bowl, combine the sausage, potatoes, and green beans.
Drizzle the olive oil over the mixture and sprinkle with garlic powder, onion powder, smoked paprika, salt, and pepper.
Stir everything together until evenly coated.
Spread the mixture in an even layer on a large baking sheet.
Roast in the preheated oven for 35-40 minutes, stirring halfway through, until the potatoes and green beans are tender and the sausage is browned and crisp.
Remove from the oven and let cool for a few minutes before serving.