This is the perfect soup for your long hot summers! This recipe is from Martha Stewart's new cookbook, Martha 100.
Put all the ingredients, except the garnishes, in a large bowl. Add one cup water and stir until combined. Cover and let marinade in the refrigerator overnight, or up to 2 days.
Working in batches, process the soup in a food processor or blender until the vegetables are mostly smooth. Season with additional salt and served chilled. Top with cherry tomatoes and cilantro, if desired.