Just make the potatoes the way you usually make them, but toss into the water with the potatoes approximately one garlic clove for every two potatoes. Mash it into the potatoes along with the butter and cream and salt to taste with garlic salt. I like to use red potatoes, and I leave the skins on. My son says his mom makes the best mashed potatoes. When I told him everybody thinks their mom's potatoes are best, he responded, "Well...they're wrong!". Does he know how to get on his mom's good side, or what?