In a mixing bowl, toss together the potatoes, olive oil, salt and pepper.
Place them in a single layer on a baking sheet and put them in the oven. Roast them for 10-15 minutes or until fork tender, rotating them half way through the cooking process.
Place the potatoes on an oven safe dish and drizzle them with the Buffalo sauce and ranch dressing. Sprinkle on the cheeses and place in the oven to melt the cheese. Serve immediately.
Sprinkle on the cheeses and place in the oven to melt the cheese. Serve immediately.