Steamed Fish en Papillote

Preparing foods en papillote, which loosely translates to “wrapped in paper,” is actually another way to steam food, even though it takes place in the oven rather than on the stove. It is most commonly used for fish fillets but is also well suited to shellfish and leaner cuts of chicken, such as boneless breast halves. This French technique always manages to impress, the pretty little packages resembling gifts, one for each guest. When the packets are slit open—ceremoniously, at the table—their fragrant aromas are released all at once, hinting at the tastes to come. These bundles are ideal for entertaining, but cooking en papillote has other advantages, too. The packets can be assembled a few hours ahead of time (covered with plastic wrap and refrigerated on a baking sheet) and then tucked into the oven once your guests arrive. And, like other steaming methods, it doesn’t require much added fat; instead, the sealed parchment traps in all that wonderful moisture and flavor. In this recipe, a compound butter helps bring all the components together while adding richness to the dish. Forming the packets is easy—no special skills required. The shape isn’t as important as making sure the edges are tightly sealed. You can fold the parchment into envelopes, wrap it into bundles, or form it into bags, but half-moon packets are the classic shape. The traditional technique begins by cutting paper into a heart shape, but this one starts out as a simple rectangle.