The main ingredient in a Caesar salad is romaine lettuce. This salad, which is popular for its crisp texture and refreshing taste, is typically dressed with a blend of ingredients that often includes garlic, anchovies, lemon juice, egg yolk, Dijon mustard, Worcestershire sauce, and olive oil. In addition to the romaine, Caesar salads often feature croutons for added crunch and shaved or grated Parmesan cheese for a rich, savory flavor. Variations can include grilled chicken or seafood as a protein source, but the classic Caesar remains beloved for its simple, crisp foundation of lettuce.