Preheat oven to 375 degrees. Line a baking sheet with foil.
Place chicken breast fillets and peppers and onions onto the sheet pan.
Sprinkle garlic powder, salt, black pepper, chili powder, and cumin evenly over the chicken and veggies.
Drizzle 3 Tbsp. Mazola Corn Oil over the chicken and veggies.
Cook in the oven for 12-13 minutes, or until the chicken is cooked through.
While the chicken and veggies are cooking, mash avocado, cilantro, Greek yogurt, salsa and lime juice together until the guacamole has reached your desired consistency. Set aside.
Cook quinoa as directed by the back of the bag. Once cooked, mix lime juice, seasonings, and cilantro in with the quinoa. Set aside.
Brush each corn tortilla with just a little bit of Mazola Corn Oil and warm them over med-low heat.
Once the fajitas are done, allow the chicken to rest for a few minutes before slicing. Once sliced, serve/make fajitas to your liking.
Enjoy!