Tuna Bourride

Many fish markets carry whole steaks from large fish such as tuna, swordfish, shark, or Chilean sea bass. While these firm-fleshed fish are perfect in fish soups and stews, you’re left with the problem of not having heads or bones to make the broth. I sometimes make a broth with inexpensive whole fish, but since these aren’t always easy to find, I often make a tomato broth—a kind of light tomato soup—to surround the fish in a wide soup plate. I then sauté or grill whole steaks of tuna and s