I finally took the plunge and tried this odd recipe. It was the most delicious fish I've ever tasted, moist and silky texture. It is NOT oily tasting at all, and you can even eat the lemon slices. Yum! Next I'll try it with salmon. Poaching fish in oil may seem like an unusual cooking method, but it's actually a little like confit, the traditional preparation in which meat is cooked in its own fat. The idea comes from a guest television talk show appearance by Mario Batali, the chef of New York City's Babbo, and the technique he demonstrated is adapted here for home use. The fish fillets stay extremely moist, but without any taste of oil, and the layers of lemon slices, which lose their tartness when heated with the oil and salt, infuse the dish with wonderful citrus notes. Another bonus: the oil doesn't pick up any fish flavor (believe it or not) - it tastes lemony and slightly salty - and only a small amount is served with the dish, so the rest can be used again in a vinaigrette, or added to mashed potatoes, or saved for cooking. This recipe takes only about 15 minutes to prepare for cooking - but then the slow poaching method adds an hour or more to the total time from start to finish.