One of the most valuable recipes in any cook's get-dinner-on-the-table-fast arsenal is a reliable, adaptable veggie dish. And when the weather's warm, look no further than this refreshing no-cook side, from Katie Workman's new book, Dinner Solved!, that delivers major flavor without your having to turn on the oven. The base layer starts with two staples of the produce aisle: celery and romaine hearts.