Put 1 pound diced red-skinned potatoes and 3 cups shredded red cabbage in a pot; cover with water, season with salt and bring to a boil. Cook until tender, about 35 minutes. Reserve 1/4 cup of the cooking water, then drain. Mash the vegetables with 2 tablespoons butter, adding the reserved cooking water as needed. Season with salt and pepper.
Photograph by Johnny Miller