Wash and chop the potatoes into small chunks and place them into a saucepan with cold water to cover at least an inch above. Add kosher salt to the water and bring to a boil. Then reduce the heat to medium and allow the potatoes to cook until fork tender.
In a smaller saucepan on low heat, combine the milk, butter, remaining teaspoon of salt, pepper, and garlic until warm. Once the potatoes are finished cooking, strain the potatoes and discard the water.
Pour the warm milk mixture over the potatoes in the saucepan and mash the potatoes using a potato masher until you reach the desired creaminess and consistency.
Add more milk if needed and taste the potatoes to see if you need to increase any of the seasonings. Serve with your favorite meal.