Heat a skillet over medium heat and add olive oil.
Once the oil is hot, add the shredded brisket and heat for 3-4 minutes, stirring occasionally. Season with salt and pepper.
Warm the tortillas in a separate pan for about 1 minute on each side or microwave them for 20-30 seconds.
To assemble the tacos, place the warmed tortillas on a plate, then spoon the brisket evenly onto each tortilla.
Top with sliced avocado, chopped cilantro, onion slices, and a drizzle of salsa if desired.
Serve with lime wedges on the side for an added burst of freshness.
