Peel and rinse potatoes. If your potatoes are not the same size when peeling, cut them until they are approximately the same size so they all cook evenly.Add potatoes to a large stock pot and add just enough water to cover the potatoes.Gently boil potatoes until you are able to easily poke a fork through them.Then drain potatoes in a colander.Transfer the potatoes to a mixing bowl and add butter, cheese, garlic and herb, salt, pepper, and chives.With a potato masher, mash potatoes while slowly pouring in the milk. Add a little milk at a time. You may need more or less depending on the size of your potatoes. Stir potatoes to combine well.Enjoy!