Preheat the oven to 425 degrees F. Spread the potatoes across a large baking sheet, greased with oil Drizzle the potatoes with a couple tablespoons of oil and toss thoroughly to coat. Place in the oven and roast for 35-40 minutes.
Once the potatoes have started roasting, trim and halve the Brussel sprouts. Toss well to coat. Sprinkle with 1/2 teaspoon of salt and 1/2 teaspoon of pepper. Add the Brussel sprouts 1/2 way cooking the potatoes.
Cook and crumble the sausage in a skillet over medium high heat. Drain any grease and discard. Grease a large baking dish and combine the roasted potatoes, Brussel sprouts and sausage Stir gently to combine. Stir in the cubes of cheese as evenly throughout the dish as possible. Sprinkle with Pecorino Romano or Parmesan.
Reduce the oven temperature to 400 degrees and bake until the cheese has melted, about 15 minutes. Let rest 10 minutes before serving. (Stir in desired, right before serving). Enjoy!
