DIRECTIONS
Put the onion in a small bowl and pour in enough red wine vinegar to cover it well.
Set aside for at least 30 minutes or up to several weeks.
Pour olive oil into a small bowl and add the ancho chile powder, oregano, cumin, chopped cilantro and jalapeno. Mix well.
Place the fish on a dish and pour the marinade over it, making sure to coat the fish well on both sides.
Allow to marinate for 20 minutes.
Heat a nonstick saute pan over medium-high heat.
Remove fish from the marinade and place it in the hot pan. Season with salt.
Cook fish for 4 minutes undisturbed, then turn over and cook for another 2 minutes.
Remove pan from the heat and flake the fish into the pan with a fork, making sure to mix in all the marinade that has stuck to the bottom of the pan.
Check for seasoning and add more salt if necessary.
Set aside.
Place four of the tortillas on a plate and sandwich them between 2 slightly dampened sheets of paper towel.
Microwave on high for 45 seconds.
Place the warm tortillas in a towel-lined basket or plate and cover. Repeat with the remaining tortillas.
To assemble the tacos, place a heaping spoonful of the marinated flaked fish onto the center of a tortilla.
Top with the marinated onions.
Serve accompanied by Mexican crema and salsa.
Garnish with lime wedges and cilantro sprigs