The primary ingredient in a traditional burger is ground beef, typically formed into a patty. The beef is usually seasoned and then grilled, fried, or broiled before being placed in a bun. While ground beef remains the classic choice, variations using turkey, chicken, lamb, or plant-based proteins are also popular to accommodate various tastes and dietary preferences. In addition to the patty, burgers can be customized with a variety of toppings, including lettuce, tomatoes, onions, cheese, and condiments. The versatility of the burger allows for a wide range of flavors, making it a beloved staple in many cuisines.