Russet potatoes, with their low moisture and high starch content, are excellent potatoes for mashing. But other types of potatoes, such as Yukon gold potatoes and round white or round red potatoes, will work too but will make a stickier mash.
To make this plant based, use a milk substitute.
In a large stockpot, cover the potatoes with water. Bring to a boil. Reduce heat and simmer until tender, about 15 minutes. Drain the potatoes thoroughly and return to the stockpot.
In a small saucepan, cover the garlic with water. Bring to a boil. Reduce heat and simmer until tender, about 10 minutes. Drain the garlic.
In a food processor or blender, combine the garlic and milk. Puree until smooth. Add the pureed garlic and the margarine to the potatoes. Mash to desired consistency. Season with black pepper to taste. Garnish with parsley and serve immediately.
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