Combine the avocado oil, lime juice, chili powder, salt, garlic powder, cumin, and cayenne pepper in a mason jar or blender.
Shake or blend until well mixed..
Place the chicken in a shallow dish and pour the marinade over it. Allow to marinate in the refrigerator for 2 hours.
Remove the chicken from the marinade and discard.
Heat your Blackstone griddle to medium-high heat.
Brush with avocado oil.
Add the onions and peppers to one side of the griddle and the chicken to the other.
Cook for about 6 to 9 minutes, until the chicken is cooked through and the vegetables are lightly charred.
Remove from the heat.
Heat the tortillas until warmed through, about 1 minute.
Serve the meat and veggies with the warm tortillas and desired toppings.
