Caramelized Onion and Bacon Mashed Potatoes

small white onion, thinly sliced

butter (for caramelized onions in pan)

potatoes, peeled, diced and boiled or steamed until very soft (I used Ore Ida Steam and Mash from frozen section)

milk

butter, softened (to add to potatoes)

bacon, cooked and diced

parmesan cheese

pepper