Ingredients

  • 1 large zucchini
  • 1 large fennel bulb
  • 1/4 Preserved Lemon
  • 5 cups Nage
  • 1 cup Mussel Stock
  • 1/4 teaspoon saffron threads
  • 4 (8-ounce) halibut steaks
  • Fine sea salt, to taste
  • Freshly ground white pepper, to taste
  • 2 ripe tomatoes, peeled, seeded, and cut into 1/2-inch dice
  • 1 small shallot, peeled and finely diced
  • 1 tablespoon drained capers
  • 2 tablespoons extra virgin olive oil
  • 4 fresh basil leaves
  • 8 oil-cured black olives, pitted and diced small
  • 1/2 fresh lemon
  • 4 large, deep dinner plates

Method

  • Bring a pot of salted water to a boil.
  • Cut the zucchini lengthwise down the 4 sides, taking off all of the green and about 1/2 inch of the white in each of the 4 pieces.
  • Discard the white, inner section.
  • Cut the rest into 1/2-inch dice.
  • Blanch until crisp-tender, about 3 minutes.
  • Drain, plunge into ice water, and drain again.
  • Set aside.
  • Take off the outer 2 layers of fennel and save the rest for another use.
  • Trim away any thin, flexible sections near the edge of the fennel.
  • Cut the firm, thick part into 1/2-inch dice.
  • Blanch as with the zucchini.
  • Scrape all pulp and pith from the preserved lemon and cut the yellow rind into fine julienne.
  • Blanch for 1 minute, refresh in ice water, drain again, and set aside.
  • (The recipe can be made to this point up to several hours ahead.)
  • Put 2 cups of nage and the mussel stock in a small saucepan and bring to a boil.
  • Add the saffron and boil for 2 to 3 minutes.
  • Set aside.
  • Bring 3 cups of nage to a boil in a 10-inch-wide pot.
  • Season both sides of the halibut with salt and pepper.
  • Add the halibut to the pot and adjust the heat so the liquid just simmers.
  • Poach until a metal skewer inserted into the center of the halibut meets only a little resistance, 5 to 6 minutes, and the skewer, when left in the fish for 5 seconds, feels barely warm when touched to your lip.
  • The halibut will be rare (thinner steaks will be ready sooner).
  • Take the steaks out of the liquid as soon as they are done.
  • Meanwhile, put the zucchini, fennel, preserved lemon, tomatoes, and shallot in a medium saucepan over medium-low heat.
  • Add the capers and the olive oil.
  • Season with salt and pepper.
  • Just warm the vegetables through, about 2 minutes; do not let them cook further.
  • To serve, cut the 4 basil leaves across into thin strips.
  • Stir the olives into the vegetables and squeeze the 1/2 lemon over them.
  • Pull the skin off the halibut.
  • Reheat the saffron broth, if necessary.
  • Put the halibut in the center of the plates and arrange the vegetables over and around the steaks.
  • Pour the saffron broth around the halibut.
  • Scatter the basil over and around the fish and serve immediately.