Heat the oil in a cast iron skillet over medium-high heat. Season the chicken generously on each side with taco seasoning.
Add the chicken to the heated skillet and let it sear on the first side, untouched, for five minutes. It will begin to release from the skillet once it’s ready to flip.
Use kitchen tongs to carefully flip the chicken once it’s reached a deep golden brown color, and sear the other side for 4-5 more minutes, decreasing the heat slightly if needed.
Remove from the heat and let it sit for at least 5 minutes prior to slicing it to allow the juices to absorb.
Fill a large bowl (or even a pie diswith the romaine lettuce. Top it with all additional ingredients and serve immediately!
