Bring a large pot of salted water to a boil. Add the potatoes (peeled) and cook for about 15 minutes or until tender and can easily be pierced knife. Drain the potatoes and mash them with a potato masher. Halfway through, add a splash of milk, the cheese, and some salt and pepper, and continue to mash until cheese is blended and potatoes are smooth. Taste, season as needed, and set aside.