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Salmon with Agrodolce Sauce

Pan-seared salmon fillets served with a sweet and sour (agrodolce) sauce made from caramelized red onions and balsamic vinegar. This elegant dish combines the richness of salmon with the complex flavors of Italian agrodolce.

4 servings
30 min
Published October 4, 2025
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Ingredients

  • •3 tablespoons olive oil, divided
  • •4 pieces salmon fillets
  • •2 medium red onions
  • •⅔ cup balsamic vinegar
  • •1 teaspoon sugar
  • •1 tablespoon unsalted butter

Cooking Instructions

  1. 1.

    Heat 1 tablespoon oil in a 12-inch nonstick skillet over medium heat until hot. Pat salmon dry and sprinkle with 1 teaspoon salt and 1/2 teaspoon pepper, then cook, skin side up, until undersides form a golden crust, 12 to 15 minutes. Turn fish over and cook until just cooked through, about 3 minutes more.

    18 min

  2. 2.

    Meanwhile, heat remaining 2 tablespoons oil in a large skillet over medium-high heat until it shimmers, then sauté onions until golden brown and crisp-tender, 6 to 8 minutes. Stir in vinegar, sugar, and 1/2 teaspoon salt and cook until sauce is syrupy, about 2 minutes. Remove from heat and stir in butter.

    10 min

  3. 3.

    Spoon onions with sauce onto plates and top with salmon, skin side down.

    2 min

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