01 - Set the oven to 400°F (204°C) and allow it to reach temperature.
02 - Line a large baking sheet with parchment paper or lightly grease it with oil.
03 - In a large bowl, toss the sliced sausage, halved potatoes, and Brussels sprouts with olive oil, kosher salt, black pepper, smoked paprika, and garlic powder until evenly coated.
04 - Spread the sausage and vegetable mixture in an even layer on the prepared baking sheet without overcrowding.
05 - Place the tray in the oven and roast for 25 minutes. Stir the mixture, then continue roasting for an additional 10-15 minutes or until the potatoes are fork-tender and the Brussels sprouts are golden-brown at the edges.
06 - Remove from the oven and transfer to serving plates. Serve hot.