In a medium stockpot, rewarm brisket on medium-low until warmed through. Then toast your tortillas.

To toast tortillas on a gas stove: Remove all pans from burners and turn all your burners to medium-low heat. Lay a tortilla on each grate over the flames. Cook about 30 seconds per side. You are looking for the tortillas to start to bubble slightly and just start to smoke (be sure to have your oven fan on for this step). Then flip and toast the other side once it is toasted. You can use tongs or a fork if you are worried about getting burned.

To assemble, top each tortilla with a large forkful of brisket and dress with your favorite toppings. Serve immediately.