Ingredients

  • 1/2 cup fresh lemon juice
  • 2 teaspoons Dijon mustard
  • 3/4 cup extra-virgin olive oil
  • 1 cup cherry tomatoes, quartered
  • 2/3 cup Kalamata or other brine-cured black olives, pitted and halved
  • 2 tablespoons drained capers, rinsed
  • Salt and freshly ground black pepper
  • 1 (2 pounds) halibut steak (1 1/2-inch thick), skinned, boned, and cut into 4 pieces

Method

  • Preheat oven to 400 degrees F.
  • Whisk together lemon juice and mustard.
  • Add oil in a slow stream, whisking until emulsified.
  • Stir in tomatoes, olives, capers, and salt and pepper, to taste.
  • Arrange the fish steaks in a ceramic or glass baking dish just large enough to hold them in 1 layer.
  • Pour the vinaigrette over fish.
  • Cook the fish in middle of oven until just cooked through and no longer translucent, 7 to 9 minutes.
  • Serve fish with the vinaigrette from the baking dish.