Roasted Garlic Mashed Potatoes

6 cloves garlic
1 Tbsp olive oil
1 1/2 lb potatoes
5 Tbsp butter
1/2-2/3 C warm milk
salt & pepper
1/2 C grated Parmesan cheese

Preheat oven to 400. Place garlic cloves on small square of aluminum foil; drizzle with olive oil. Wrap foil around garlic and bake 20 minutes or until golden. Quarter potatoes and cover with water in large pot. Bring to a boil and simmer about 15 minutes. Drain. Return potatoes to hot pot and mash. Mash in garlic. Mix in butter, milk, salt and pepper. Transfer to oven proof dish. Top with Parmesan. Bake 15 minutes or until top is golden.