Wash well and separate the leaves from the stems and midribs of:
Cut the stems and midribs into ½-inch pieces. Coarsely chop the leaves. Rinse well, but do not dry.
Heat in a large skillet over medium-low heat:
Add and cook until the oil is fragrant and the garlic is just beginning to color:
Add the stem and rib pieces and cook, stirring occasionally, until nearly tender, about 2 minutes. Add the leaves and cook, partially covered, until both the leaves and stems are tender, 3 to 5 minutes more. Season to taste with:
Or, if not using anchovies, dot with: