Roasted Smoked Sausage and Potatoes

1 pkg. smoked sausage, sliced into rounds or quarters (I used Oscar Meyer Italian Herb Selects)
1 large i=onion, peeled and chopped
5 large potatoes, peeled, or 2 bags dutch potatoes, cut into 1/2" cubes (I used 1 bag Klondike & 1 bag Dutch--they don't have to be peeled)
2 T. olive oil
salt
pepper
paprika, to taste
1-2 T. Italian seasoning
grated mozzarella cheese

Preheat oven to 400. Line large baking tray (with sides) with several sheets of foil. Spray the foil. Set aside. Put the sausage, onions, and potatoes in large bowl. Drizzle with oil and season to taste with spices. Toss together well. Pour onto baking tray and spread out as much as you can. Place in the oven and roast for 45 minutes to 1 hour, turning every 15 minutes, until potatoes are golden brown and tender. Turn off oven. Scatter cheese over top and return to oven for a few minutes to melt the cheese. Yummy!
1st picture is before baking, 2nd picture is after baking and adding cheese.