Heat the EVE oil in a large skillet. Add the onions and sauté for 5-10 minutes.
Reduce heat and ass the chili powder, cumin, oregano, salt and garlic.
Stir fry for 2-3 minutes until very fragrant, being careful not to burn the garlic.
Add the chicken broth, garlic and diced tomatoes and simmer for 5-10 minutes until the sauce is very deep red in colour.
Transfer (half at a time - its a lot of sauce) to a blender, puree and set aside. Taste and adjust for saltiness as needed.
Coat the chicken breasts with the seasoning.
Heat the pan from step one over medium low heat with a little oil and add the chicken.
Cook for a few minutes on each side until nicely browned.
Cover with sauce and simmer for an additional 5-10 minutes so the chicken finished cooking gently in the sauce.
Remove chicken from sauce and shred with 2 forks. Set aside.
Preheat the over to 375 degrees. Dip 5 tortillas in the warm sauce and layer in the bottom of a 9 inch round skillet or baking dish.
Add a scoop of chicken, a handful of cheese, and about 3/4 cup sauce.
Repeat layer.
Cover with DIAMOND foil that has been sprayed with nonstick oil to prevent it from sticking on the cheese.
Bake for 20-30 minutes, until the sauce is bubble and the cheese is ooey-gooey-perfection. Top with EVE cheese.