A classic and simple recipe for rich, creamy, and flavorful Garlic Mashed Potatoes. This comforting side dish features russet potatoes that are boiled until tender and then mashed. The creaminess and savory flavor come from a mixture of half-and-half that has been infused with crushed garlic, which is then stirred into the potatoes along with a generous amount of grated Parmesan cheese.