Serves 4


  • 1 1/2 pounds Swiss chard
  • 3 Tbsp. olive oil
  • 1 red onion, sliced
  • 3/4 tsp. salt
  • 4 (7-ounce) boneless chicken breast halves
  • 3 ounces Gruyère, separated into 3/4-ounce pieces
  • 2 Tbsp. chopped fresh parsley
  • 2 Tbsp. chopped fresh thyme
  • 1/4 tsp. black pepper
  • 1 Tbsp. plus 1 tsp. Dijon mustard
  • 3/4 cup white wine
  • 1 Tbsp. unsalted butter


    Active time: 40 minutes
    Total time: 1 hour

    In a pot of boiling salted water, cook sliced Swiss chard stems 2 minutes. Transfer to a bowl.

    Add leaves to pot and cook 1 minute. Drain, squeeze out water, chop and add to bowl. In same pot, heat 2 Tbsp. olive oil over medium heat. Add red onion and cook until tender, 7 minutes.

    Add chard and season with 1/2 tsp. salt. Cover and set aside. Preheat oven to 400°. Starting from thinner side, cut a pocket in every chicken breast half. In each, place a 3/4-ounce piece of Gruyère and 1/2 Tbsp. each parsley and thyme. Use 2 toothpicks to seal each breast shut. Season with 1/4 tsp. each salt and black pepper and 1 tsp. Dijon mustard. In a large, ovenproof skillet, heat 1 Tbsp. olive oil and cook chicken until golden, 4 minutes. Flip, transfer skillet to oven and bake until chicken is just cooked, 12 minutes.

    Transfer chicken to a plate. Add white wine to skillet and simmer until reduced by half. Add reserved chard and 1 Tbsp. each Dijon and unsalted butter. Divide chard among 4 plates, top with chicken and accumulated juices and serve.

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