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Crisp Mackerel Salad with Grainy-Mustard Vinaigrette

Atlantic mackerel is safer than the Spanish variety, which is high in mercury.

  • servings: 4
Photography: Lara Robby

Ingredients

  • 4 fresh Atlantic mackerel fillets (also called Boston mackerel), skin on (about 4 ounces each)
  • Juice of 1 lemon, (about 2 Tablespoons)
  • 2 tablespoons white-wine vinegar
  • 1 tablespoon finely chopped shallot
  • 1 tablespoon whole-grain mustard
  • 1 small garlic clove, minced
  • 1/2 teaspoon coarse salt
  • 1/4 teaspoon freshly ground pepper
  • 3 tablespoons extra-virgin olive oil
  • 1 tablespoon chopped fresh tarragon
  • 1 tablespoon chopped fresh chives
  • Vegetable-oil cooking spray
  • 4 cups watercress, thick stems discarded

Directions

  1. Step 1

    Preheat broiler. Place mackerel, skin side down, in a nonreactive baking dish. Pour lemon juice over fish, and let stand 10 minutes, turning once or twice.

  2. Step 2

    Meanwhile, whisk together vinegar, shallot, mustard, garlic, 1/4 teaspoon salt, and 1/8 teaspoon pepper. Let stand 10 minutes. Add oil, whisking until emulsified. Add tarragon and chives.

  3. Step 3

    Remove mackerel from lemon juice, and pat dry. Score skin 3 times. Season with remaining 1/4 teaspoon salt and 1/8 teaspoon pepper.

  4. Step 4

    Coat a broiler pan with cooking spray. Lay mackerel, skin side up, on pan. Broil until fish is cooked through and skin is crisp and browned, 3 to 4 minutes.

  5. Step 5

    Toss watercress with 1 tablespoon vinaigrette. Serve mackerel over watercress, and drizzle with remaining vinaigrette.

Source
Martha Stewart Living, August 2007