When I get my hands on a cookbook I really like, it's hard to resist cruising through it and trying a number of the offerings. So it is with Ottolenghi's Jerusalem. I like fish sometimes as part of a mostly whole foods plant-based diet and this is a great way to eat fish. Some may be aghast at the amount of fat that will show up when the nutritional analysis is done. Remember, however, it's mostly from olive oil and many believe the Mediterranean diet is very healthy.
You can use cod, halibut, hake, pollock — maybe check the Monterey Aquarium's Seafoodwatch site. I used halibut this time and it was a little weird chopping it up but it worked. a sharpened knife really helped. And as you will see in the picture, the "non-toxic" nonstick pan did a good job of frying the cakes.
Best to do this recipe, which I modified a bit, only if you have some time to hang out and cook. I realize that is just a fantasy for some. Try it in the future.