In Mexico, tacos don't have lettuce on them. Or tomatoes, Or cheese. Authentic tacos are filled with high-quality marinated meats (or vegetables), & are delicious as they are. They don't need extra trimmings that you find on less traditional tacos.

Pollo. Pollo, or chicken, is another staple taco meat. The trick to having killer pollo tacos, though, is to mix up the style. Chipotle chicken is a popular substitution, for example, and it can completely change what you thought you knew about pollo tacos.

The difference between street tacos and regular tacos is that street tacos are smaller in size and made with a corn tortilla. Street tacos got their name from the place of their origin, the streets of Mexico. Mexican migrants that worked on mines and farms would wrap their tortillas around meat to eat on the go.