Thinly slice the red cabbage, cilantro, white cabbage ( or cabbage mix).
Combine in a small bowl along with olive oil, salt and pepper. Cut half the lime and squeeze the juice into the bowl. Combine thoroughly and set aside.
Mix the spices for the fish together. Rub the spices on the fish. Sear in a cast iron skillet to blacken the fish. Then lower the heat and cook through. Let rest. Cut into small pieces and Set aside.
Toast the tortillas in the toaster. Set aside.
Cut the Avocado. Set aside.
Assemble the Taco - Fish, cole slaw, cilantro, avocado, lime juice and top with Cotija cheese.