In a bowl, combine tomatoes, onions, cilantro, jalapeños, and lime juice. Mix until well combined, then season with salt, pepper, and Tajìn.
In another bowl, season the fish with 1 tbsp olive oil, onion powder, garlic powder, cumin, chili powder, lime juice, salt, and pepper. Mix until each piece of fish is well coated.
Heat oil in a skillet. Fry corn tortillas for about 1-1.5 minutes, then fold them into the shape of a taco and cook on both sides until golden and crisp.
In the same skillet, add 2 tsp of oil, the fish and diced tomatoes. Cook for about 5 minutes on both sides, or until the fish is opaque and flakes easily with a fork. Add a little water to create a bit of sauce. Once the fish is cooked through, use a fork to flake the fish. Add a squeeze of lime juice and remove from the heat
Stuff the tacos with fish, pico de gallo, queso fresco, and sour cream. Enjoy!
Notes
If you want to make more, feel free to double the recipe!