Season the potatoes to taste and microwave them on high for 3 to 5 minutes -- 3 for medium potatoes, 5 for large -- then turn them over and microwave for another 3 to 5 minutes. Using tongs, transfer the potatoes to a shallow dish or sheet pan and bake them in the oven until browned, about 10 to 15 minutes.ake the potatoes for 30 minutes, lower the heat to 250 F and place a pot with about 1 inch of hot water in the bottom of the oven. The potatoes will be ready in 1 hour -- but stay fresh for another 2 hours. That's the advantage of the method.