Salmon with Lentils and Mustard-Herb Butter (Saumon aux Lentilles)

A classic French dish featuring perfectly seared salmon served over tender green lentils, all topped with a flavorful mustard-herb compound butter. The combination of rich salmon, earthy lentils, and bright herbs creates an elegant and satisfying meal.

4 servings
1 hr

Ingredients

  • 5 tablespoons unsalted butter, softened
  • 1 tablespoon chopped chives
  • 1 teaspoon chopped tarragon
  • 2 teaspoons grainy mustard
  • 2 teaspoons fresh lemon juice
  • 1 cup French green lentils
  • 4 cups water
  • 2 medium leeks (white and pale green parts only)
  • 1 tablespoon unsalted butter
  • ½ tablespoon fresh lemon juice
  • 4 pieces skinless salmon fillet
  • 2 tablespoons unsalted butter

Cooking Instructions

  1. 1.

    Stir together all ingredients with 1/4 teaspoon each of salt and pepper.

    5 min

  2. 2.

    Bring lentils, water, and 3/4 teaspoon salt to a boil in a heavy medium saucepan, then reduce heat and simmer, uncovered, until lentils are just tender, 20 to 25 minutes. Remove from heat and let stand 5 minutes. Reserve 1/2 cup cooking liquid, then drain lentils.

    30 min

  3. 3.

    While lentils cook, chop leeks, then wash . Cook leeks in butter in a heavy medium skillet over medium-low heat, stirring occasionally, until softened, 6 to 8 minutes.

    8 min

  4. 4.

    Add lentils with reserved cooking liquid to leeks along with 3 tablespoons mustard-herb butter and cook, stirring, until lentils are heated through and butter is melted. Add lemon juice and salt and pepper to taste. Remove from heat and keep warm, covered.

    5 min

  5. 5.

    Pat salmon dry and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper (total).

    2 min

  6. 6.

    Heat butter in a large nonstick skillet over medium-high heat until foam subsides, then sauté salmon, turning once, until golden and just cooked through, 6 to 8 minutes total.

    8 min

  7. 7.

    Serve salmon, topped with remaining mustard-herb butter, over lentils.

    2 min

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