1
Wash and dry produce.
Dice potatoes into ½-inch pieces. Place in a medium pot with enough salted water to cover by 2 inches. Bring to a boil and cook until tender, 10-12 minutes. Reserve ¼ cup potato cooking liquid, then drain. Return potatoes to pot and keep covered until ready to mash in Step 5.
Drain corn, then pat dry with paper towels. Peel and mince or grate garlic.