A Caesar salad typically consists of romaine lettuce, croutons, Parmesan cheese, and a dressing made from olive oil, lemon juice, egg yolk, and Worcestershire sauce. Some variations may include grilled chicken or shrimp to make it a more substantial dish. The original Caesar salad was created in the 1920s by restaurateur Caesar Cardini and has since become a popular choice in various cuisines, often praised for its crunchy texture and bold flavors.