Cut the potatoes into 1 inch pieces. You could peel the potatoes first, but I'm a fan of the texture the peels give the mashed potatoes, so I don't ever peel them.
Place potatoes in large pot and then fill with water until there are at least three inches of water over the top of the potatoes. Cover with a lid and place on the stove to boil over high heat.
Once boiling, remove the lid and reduce heat if necessary to keep water from boiling over.
Boil potatoes until they fall apart when pierced with a fork, about 20-25 minutes.
Drain potatoes, then return to pot, adding the salt, milk, and roasted garlic.
Mash together with a potato masher until desired consistency is reached.
Serve hot and enjoy!