In a shallow-dish, mix together oil, garlic powder, lime juice, chili powder, paprika, cumin, pepper and salt. Then add cod, toss till evenly coated and lightly rub all the seasoning to the fish onto alll sides. Let marinate for 15minutes.
Make the Slaw: In a large-bowl, stir together lime juice, cilantro, honey and mayo. Then add in cabbage, jalapeño and corn. Season with a dash of pepper and salt. Put aside.
Make the Sauce: Mix all taco-sauce ingredients in a small-bowl and put aside.
Preheat oven to 375°F. Put fish in baking-dish sprayed with cooking-spray. Then bake for 8-12minutes, or till fish flakes when pierced with a fork.
After fish is cooking, carefully break-up the fish up by means of a fork, right into bite-sized pieces. Then pop the tortillas in the microwave for 20-30seconds. (Either on a skillet for 20-30seconds each side, or on the grill for 20-30minutes or just till they get a couple of char-lines on each side).
Split fish among of heated-tortillas & top with avocado and slaw. Squeeze lime-juice on top and drizzle with sauce. You can serve with chips and enjoy!