This is a really yummy recipe, very healthy, and such a welcome comfort in a country with so little Mexican food. I tried making similar fish tacos before, but I adapted them to be not only yummier, but so much easier to make. Since I first tried making these in my home in Germany, the fish is in grams, not ounces. I believe there's a metric conversion on this site, so try that. If you still can't figure it out, just use a piece of cod that's about 8 inches high, 4 inches across the top, and 3/4 inch thick.