Ingredients

  • 6 fillets black cod, 5 to 6 ounces each, bones removed if possible
  • 1 lemon, zested
  • 1 tablespoon plus 2 teaspoons thyme leaves
  • 1/4 cup sliced flat-leaf parsley
  • 1/2 cup blanched hazelnuts
  • 6 Belgian endives
  • 10 tablespoons unsalted butter
  • 1 tablespoon plus 1 teaspoon granulated sugar
  • 2 tablespoons extra-virgin olive oil
  • Kosher salt and freshly ground black pepper

Method

  • Season the fish with the lemon zest, 1 tablespoon thyme, and 2 tablespoons parsley.
  • Cover, and refrigerate at least 4 hours or overnight.
  • Remove the fish from the refrigerator 15 minutes before cooking, to bring it to room temperature.
  • Preheat the oven to 375F.
  • Toast the hazelnuts on a baking sheet 10 to 12 minutes, until theyre golden brown and smell nutty.
  • When the nuts have cooled, chop them coarsely.
  • Remove any wilted or brown outer leaves from the endives.
  • Slice off the root ends, and separate the endives into spears.
  • Arrange the endive into stacks of five, and cut each stack in half lengthwise.
  • Heat a large saute pan over high heat for 1 minute.
  • Add 3 tablespoons butter, and when it foams, add the endive and remaining 2 teaspoons of thyme.
  • (You may need to do this in two pans or two batches.
  • Divide the ingredients accordingly if so.)
  • Sprinkle in the sugar, 1 teaspoon salt, and 1/4 teaspoon pepper.
  • Saute over medium heat about 4 minutes, until the endive is slightly caramelized and softened.
  • Turn off the heat, and leave the endive in the pan while you cook the fish.
  • Heat a large saute pan over high heat for 2 minutes.
  • (Depending on the size of your pan, you may need to cook the fish in batches.)
  • Season the fish with salt and pepper on both sides.
  • Swirl in the olive oil and wait 1 minute.
  • Carefully lay the fish in the pan, skin side down, and cook 3 to 4 minutes, until the skin is crisp.
  • Turn the fish over, lower the heat to medium-low, and cook a few more minutes, until its just cooked through.
  • Be careful not to overcook the fish.
  • When its done, the fish will begin to flake and separate a little.
  • Remember, the fish will continue to cook a little more once you take it out of the pan.
  • Transfer the endive to a warm platter, and wipe out the fish pan with paper towels.
  • Heat the pan over medium-high heat for a minute.
  • Add the remaining 7 tablespoons butter and cook a few minutes, swirling the pan occasionally, until the butter browns and smells nutty.
  • Turn off the heat, wait 30 seconds, and add the hazelnuts.
  • Season with 1/2 teaspoon salt, a pinch of pepper, and a squeeze of lemon juice.
  • Stir in the remaining 2 tablespoons sliced parsley.
  • Arrange the fish over the endive.
  • Stir the brown butter, scraping the bottom of the pan to incorporate all the little brown flecks.
  • Spoon the butter over the fish.