INGREDIENTS
- For mustard-herb butter
- 5 tablespoons unsalted butter, softened
- 1 tablespoon chopped chives
- 1 teaspoon chopped tarragon
- 2 teaspoons grainy mustard
- 2 teaspoons fresh lemon juice
- For lentils
- 1 cup French green lentils
- 4 cups water
- 2 medium leeks (white and pale green parts only)
- 1 tablespoon unsalted butter
- 1/2 to 1 tablespoon fresh lemon juice
- For salmon
- 4 (6-ounce) pieces skinless salmon fillet
- 2 tablespoons unsalted butter
PREPARATION
- Make mustard-herb butter:
- Stir together all ingredients with 1/4 teaspoon each of salt and pepper.
- Cook lentils:
- 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.
- 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.
- 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.
- Sauté salmon while leeks cook:
- Pat salmon dry and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper (total).
- 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.
- Serve salmon, topped with remaining mustard-herb butter, over lentils.
Cooks' notes:
·Mustard-herb butter can be made 1 day ahead and chilled, covered. Soften at room temperature before using (1 hour).
·Lentils can be cooked (but not drained) 1 day ahead and chilled in cooking liquid, covered (once cool).
·Lentils can be cooked (but not drained) 1 day ahead and chilled in cooking liquid, covered (once cool).