In the southwest and Mexico, there are little stands serving tasty meat, wrapped in a corn tortilla and topped with salsa. The Taquerias serve the best Tacos Al Carbon. This is a pretty authentic recipe for these tasty little tacos. It is flank steak marinated with all the flavours of Mexico. The avocado salsa is a great side dish by itself, but is excellant as a filling for the tacos. It does need to marinate for 4-6 hours. Don't forget the cerveza with lime!