Lay the tortilla shell flat and on one side add the chicken and onion mix, the cheese and the cilantro. Sprinkle on the reserved Tajin.
In a large pan over medium heat, spray or brush the surface with olive oil. Then lay the tortilla with all the ingredients flat. Cook for one minute and then fold one side over.
Cook on each side for an additional 2-3 minutes.
*** More than likely you will have to make these in batches. In between each batch add a little more olive oil to the pan to make sure to get the crispy, golden color.
Serve immediately with avocado crema and pickled veggies. In the photos I layered these on top, but the tacos will be best if you open them slightly after cooking and add these to the inside.