These are all the rage on allrecipes.com, and so easy, too, that I had to post them here! Suggestions on allrecipes.com included adding an extra onion and mixing everything in a bowl instead of in the roasting pan. I can hardly wait to try them!
Arrange the potatoes and onions in a greased 9x13 inch baking dish so that they are evenly distributed. Season with garlic powder, salt and chili powder. Drizzle with olive oil. Stir to coat potatoes and onions with oil and spices.
Bake for 35 to 40 minutes in the preheated oven, until potatoes are fork tender and slightly crispy. Stir every 10 minutes. When done, sprinkle with cheese. Wait about 5 minutes for the cheese to melt before serving.