Mix the ingredients together and sprinkle with the chopped green onion; serve immediately. You can also add more shredded cheddar, and bacon on top of the hot potatoes in a bowl; out-of-this-world-good.
If you like, you may also prepare this in a casserole dish. Combine the potatoes, sour cream, bacon, salt, pepper and half of the cheese and spoon into a buttered 2 quart baking dish. Sprinkle with the remaining cheese and green onion. Bake, uncovered, at 350 degrees for 20-25 minutes or until cheese is melted.
This recipe is so versatile...you can saute mushrooms with the onions, add chilies, whatever you like in your mashed potatoes.