Caramelized apples turn cauliflower soup into a sensational appetizer.
While corn and leeks are essential here, feel free to substitute potatoes, carrots, or other root vegetables for some or all of the sweet potatoes. You could also mix in yellow wax or purple beans with the green beans or use basil instead of cilantro.
Buy the freshest from-the-farm vegetables you can find for this invigorating cold soup. If ripe tomatoes and hot chiles are available, make your own salsa, or purchase your favorite brand—that it's already in the jar makes it easier to take on a picnic.