Preheat oven to 400 degrees F. Line a baking sheet with parchment paper; set aside.
In a small bowl, whisk together all sauce ingredients and set aside.
In a small bowl, combine chili powder, cumin, garlic powder, paprika, salt, pepper, oregano and onion powder.
Rub spice mixture on the outside of fish fillets and place on prepared pan. Drizzle olive oil over the top of the fish and bake for 12-15 minutes or until flaky and cooked through.
Cut or break apart fish into small pieces and divide evenly between tortillas (approx. 51 grams each). Divide sauce evenly between tacos (approx. 10 grams each) then top with desired toppings (log separately) and serve.