Follow the steps in order for the best result.
In a small skillet, or one large enough to accommodate your cod fillet, combine the olive oil and lemon juice. Heat over medium heat.
Add the dried onions, dried celery, cumin, and chili powder to the skillet. Sauté for approximately one minute, until fragrant.
Gently place the cod fillet into the skillet with the seasoned oil and lemon juice.
Cook the fillet, flipping it occasionally, until it easily flakes apart with a fork. Ensure it is cooked through.
Remove the skillet from the heat.
Flake the cooked cod into smaller pieces and load into your favorite taco shells.
For an extra burst of flavor, consider topping your fish tacos with fresh pico de gallo, creamy avocado slices, and a dollop of sour cream.