Steam

WHY IT’S LIGHT The salmon and green beans—along with capers and strips of lemon zest—are steamed in parchment (see page 18), with only one teaspoon olive oil per packet.

FLAVOR BOOSTER Everyone knows steamed fish is healthy—the trick lies in making it flavorful, too. Here, flounder fillets are spread with Dijon, rolled up, and cooked atop a bed of couscous and vegetables. A drizzle of vinaigrette provides the finishing touch.

FLAVOR BOOSTER Fennel, tomato, and wine are common ingredients in Mediterranean cooking; in this recipe, they make a wonderful bed for chicken breast halves. Once the chicken is cooked through, the vegetables become a flavorful sauce to serve alongside.

Couscous, made of semolina wheat rolled into tiny granules, is the traditional dish of Morocco and northern Africa. It is cooked to a light and fluffy texture by steaming it several times, perfumed by the aromatic spices in the steamer. It is usually paired with meat or vegetable stews—try it with Moroccan-Style Braised Vegetables—and with spicy harissa sauce (page 112). There are instant varieties available, but cooking it the traditional way results in the best texture and flavor.

Steaming is one of the simplest and most nutritious ways to cook vegetables. It is an especially good method to capture the delicate flavors of tender young vegetables such as turnips and turnip greens, carrots and carrot tops, peas and pea shoots, green beans, cauliflower, beets, and spinach. After cooking, the vegetables can be seasoned lightly with salt and perhaps a squeeze of lemon juice, or flavored with various vinegars, olive oil or butter, or a sauce.

Oliver likes to blanch his greens. Blanching vegetables means cooking them briefly in rapidly boiling water. Blanching is suitable for all sorts of leafy greens: chard, kale, beet greens, turnip tops, collards, cabbage, spinach, sea purslane, dandelion, and nettles. Blanched greens can be seasoned and served warm; chopped and added to stuffings, meatballs, soups, and stews; or dressed and served cold or at room temperature.

The part of the broccoli plant that we eat is the unopened budding sprout, meaning that broccoli is, more or less, a big unopened flower. The most typical variety of broccoli is green and fairly large. Other types include sprouting broccoli, which produces small, dark green sprouts that are harvested individually. Romanesco broccoli looks a little otherworldly; it is chartreuse-green with a conical head made of pointy spiraling florets. There is also purple broccoli, some of which has such compact heads that it looks more like cauliflower than broccoli. Select broccoli that is brightly colored and firm, with compact heads that are not wilted, yellow, or blooming. Remove the florets from the main stem and cut or break them up as desired. Trim the end of the stems, and when they are large, peel them with a paring knife or peeler. Cut the peeled stems into sticks or slices.

Steaming is a wonderful way to cook fish. It preserves the natural pristine flavor of the fish and the delicate texture of the flesh, especially of flaky white-fleshed fish such as haddock, halibut, sole, and salmon. Season the fish and cook in a steamer over simmering water in a closed pot. Aromatics—herbs, spices, and vegetables—can be added to the water for more flavor. Cook the fish until the flesh is set and no longer translucent in the center—except salmon, which is best if its center is still translucent. Steaming has the added benefit of retaining all the internal moisture of the fish, but don’t overcook the fish or it will dry out. Like baked fish, fish to be steamed can be wrapped in aromatic leaves or branches. Steamed fish goes particularly well with sauces such as Salsa Verde (page 45) and Pesto (page 230) and any butter sauce. Steamed sole is ethereally light and beurre blanc (butter sauce) adds acid and richness. Other tasty sauces to consider are Salsa Verde (page 45) or an herb butter (see page 48) or, for a very pure meal, a simple drizzle of extra-virgin olive oil and a squeeze of lemon.

Beurre noisette is browned or nut-colored, butter, a French classic that fully qualifies as a sauce yet contains only one ingredient. If you’ve never had it, beurre noisette’s complex flavor and beguiling aroma, redolent of hazelnuts, will amaze you. And if you like it over broccoli, you’ll probably find that you like it over almost any other sturdy, full-flavored vegetable.

Fish breathes new life into the “sandwich” of Mexico and the Southwest, replacing mystery meat with an identifiable fillet of delicate white fish like cod to make fish tacos, a rarity on the East Coast. Instead of frying, as is common in tacquerias, I like to steam the fish in its own juices, which can be done on top of the stove or in a microwave oven (in fact, this is one of the few cooking tasks at which the microwave excels).