Refreshing flavors with a spicy zing—and, at 15 g per serving, a whopping load of protein—come together in this classic ceviche. Rockfish, often sold under the name Pacific snapper, is high in selenium—an 85 g serving provides 44 percent of the recommended daily value of the mineral, which has a role in preventing infection and cell damage, as well as in the proper functioning of the thyroid. Rockfish is also a good source of healthy omega-3 and omega-6 fats.
Keep an eye on the fish while it is “cooking” in the lime/lemon juice; 30 minutes is usually optimum to achieve a “just cooked” texture. You can extend that to an hour or more, but after about 2 hours, you’ll find that the texture will change and become “overcooked.” Waiting to add the tomatoes and avocado just at serving time keeps flavors fresh and distinct.