I like using them for tacos.
I grill them if on the half shell, if filets then I use the cast iron.
Put a little olive oil on them and then apply taco seasoning of your choice. If you don't have one just look up a DIY spice mix (usually chili powder, cumin, paprika, garlic, S&P, etc.)
Grill or cook on a hot cast iron until flaky and done.
Taco Sauce -
Combine mayo, 1/2 ration to mayo of Greek yogurt and sour cream, one or two (or however hot you want it) jalapenos, generous handful of cilatro, juice of one lime, sprinkle of cumin. I use a food processor but a blender or hand-blender/boat motor will work.
Thinly slice some purple cabbage.
Heat up a dry cast iron and cook your tortillas until they puff up a little, flipping once.
Then make a taco>tortilla with fish+cabbage+sauce
Cody
Fightin Texas Aggie c/o 04