The primary ingredient in fajitas is typically grilled meat, most commonly beef, chicken, or shrimp. Fajitas originate from Tex-Mex cuisine and are characterized by marinated and grilled meat that is sliced into strips, served alongside sautéed onions and bell peppers. The dish is often served in a warm tortilla, allowing diners to assemble their own wraps with toppings such as guacamole, sour cream, salsa, and cheese. While the meat is the standout ingredient, the veggies and various accompaniments provide a vibrant and flavorful dining experience, making fajitas a popular choice in restaurants.