When I visited my DB and SIL this year, she made some fabulous beef tacos. Her cooking is authentic Mexican, which she learned from her mother. I watched her make this simple recipe. She served the beef with tortillas (our choice of flour or corn) and Aztec guacamole. I've also posted the recipe for the guacamole - a must for these tacos. The combination is so flavorful, tender, fresh, and, using corn tortillas, very low fat.