Make-Ahead Garlic Mashed Potatoes

These rich, creamy and delicious mashed potatoes go well with any meat entrée. 9 medium red or white potatoes, peeled and cut into pieces 6 cloves garlic, peeled 3/4 cup milk 1/2 cup heavy whipping cream 1/2 cup butter or margarine 1 teaspoon salt 1/4 teaspoon pepper...