Can double the meat and taco fixin's to use all the seasoning. A taco (tah-koh) is a traditional Mexican dish composed of a maize or wheat tortilla folded or rolled around a filling. The fact that a taco can be filled with practically any meat, fish, shellfish, vegetable, and cheese allows for great versatility and variety. A taco is generally eaten out of hand, without the aid of utensils, and is often accompanied by a garnish such as salsa and vegetables such as cilantro, onion, cabbage, tomato, or lettuce. The taco shell may be either crispy or soft.