1. Cut baked potatoes into 1 inch cubes. Place half in a greased 13 x 9 baking dish. 2. Sprinkle with half the salt,pepper and bacon. 3. Top with half the sour cream and then the cheeses. Repeat layers. 4. Bake uncovered at 350° for 20-25 minutes or until cheeses are melted. Sprinkle with the sliced onion.