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In a large pot, cover the potatoes with water and bring to a boil. Cook for 15-20 minutes, or until the potatoes are fork-tender. Drain the water completely.
While the potatoes are hot, return them to the pot and mash them with a potato masher or hand mixer. Add the butter and milk, beat until smooth and creamy. Season with salt and black pepper to taste. Set aside.
2. Make the Ground Beef and Gravy:
Heat the olive oil in a large skillet over medium heat. Add the ground be