Brush grill pan with oil, then turn heat to high. Once grill is hot, place chicken onto grill pan and cook on each side until color and grill marks develop. Meanwhile heat oven to 375 degrees F and line a baking sheet with aluminum foil.
Transfer chicken to foil-lined baking sheet and bake for 15-20 minutes until cooked through and chicken has reached an internal temperature of at least 165 degrees F.
When chicken is done, remove from oven and transfer to a cutting board/mat to rest for 5 to 10 minutes.
Chop chicken into bite-sized pieces.
To prepare the corn tortillas:
Heat a skillet over medium heat.
Spray each side of the tortillas with Canola or olive oil spray.
Add tortillas to the skillet in a single layer, as many will fit at once (typically 3 depending on the size of the skillet).
Heat until warm on one side, flip, and heat until warm on the other side, then transfer to a plate until ready to serve.
To serve the tacos:
Set out chicken, tortillas, cheese, slaw mix, salsa, any other toppings you prefer, and crema in individual dishes for a build-your-own taco experience.
Marinade adapted from Gimme DeliciousYou're Gonna Bake It After Allbakeitafterall.com