Ingredients

  • 4 cups fish stock
  • 1 cup milk
  • 3 lbs haddock fillets
  • 1/4 teaspoon salt
  • 1/4 teaspoon black pepper, freshly ground
  • 1/2 cup heavy cream
  • 3 tablespoons Dijon mustard
  • 1/4 teaspoon sugar
  • 2 tablespoons sour cream
  • 4 tablespoons unsalted butter, cut in pieces and at room temperature
  • 2 tablespoons flat leaf parsley, minced

Method

  • Combine the stock and milk in a skillet large enough to hold all of the fish in a single layer.
  • Bring to a simmer over medium heat.
  • Add the fish, salt, and pepper; and cook uncovered for 5 - 7 minutes, or until the fish just flakes when you touch it with a fork.
  • Carefully move the fish to a heated platter, cover, and keep warm.
  • Bring the poaching liquid to a boil, and reduce to 1 cup (about 10 minutes).
  • Reduce heat to medium, add the cream, and cook for 2 more minutes.
  • whisk in the mustard, sugar, and sour cream, bring back to a simmer.
  • Whisk in the butter, a bit at a time, until fully incorporated.
  • Add any juice that has accumulated on the platter, then strain the sauce over the fish.
  • Sprinkle with parsley, then serve immediately.