Preparation Blend all ingredients except beans with salt and pepper to taste in a blender until a coarse purée. Cook beans in boiling salted water until crisp-tender, 3 to 5 minutes. Transfer to a bowl of ice and cold water to stop cooking, then drain well. Toss beans with half of pesto, or to taste. Cooks' note:·Leftover pesto keeps, chilled, 1 week. To prevent discoloration, cover surface with plastic wrap.
Preparation Blend all ingredients except beans with salt and pepper to taste in a blender until a coarse purée. Cook beans in boiling salted water until crisp-tender, 3 to 5 minutes. Transfer to a bowl of ice and cold water to stop cooking, then drain well. Toss beans with half of pesto, or to taste. Cooks' note:·Leftover pesto keeps, chilled, 1 week. To prevent discoloration, cover surface with plastic wrap.