From above, two sliced duck breasts fan across pale ivory purée, surrounded by glossy emerald haricots verts, jewel-toned blackberries, and artistic streaks of deep plum thyme jus, finished with microgreens and flaky salt on a matte white plate.

Seared Duck Breast with Celery Root Purée, Haricots Verts & Blackberry-Thyme Jus

Category Main Course
Prep 20 minutes
Cook 25 minutes
Style French
Technique Pan-searing
Diet Friendly Keto

Daily Recipe: August 07, 2026

This elegant late-summer keto dish leans French without falling into steak-frites territory: crisp-skinned duck breast over a silky celery root purée, with butter-glazed haricots verts, blackberries, and a glossy thyme-pan sauce. Celery root feels seasonal and quietly luxurious, blackberries add a moody August pop, and the cool-weather richness suits a breezy evening beautifully.

Ingredients (for 2)

Preparation

  1. Step 1 - 🦆🔪🧂
    Pat the duck breasts dry. Score the skin in a shallow crosshatch pattern without cutting into the meat. Season with 1/2 teaspoon kosher salt and black pepper, then let sit at room temperature for 15 minutes.
  2. Step 2 - 🥬🍲💧
    Add the peeled, cubed celery root to a saucepan, cover with water, add a pinch of salt, and simmer for 15 to 18 minutes until very tender.
  3. Step 3 - 🔥🦆🍳
    Place the duck breasts skin-side down in a cold skillet. Turn heat to medium and cook for 8 to 10 minutes to render the fat, pouring off excess as needed. Flip and cook 3 to 4 minutes more for medium, then rest on a warm plate.
  4. Step 4 - 🫛💦⏱️
    Bring a small pot of salted water to a boil. Cook the haricots verts for 2 minutes, then drain and briefly rinse under cool water to keep them bright green.
  5. Step 5 - 🥣🧈🍋
    Drain the cooked celery root well, then blend or mash with the heavy cream, crème fraîche, 1 tablespoon butter, Dijon mustard, and lemon juice until smooth and silky. Season with more salt to taste and keep warm.
  6. Step 6 - 🧄🧅🌿
    Pour off all but 1 tablespoon duck fat from the skillet. Add the minced shallot, smashed garlic, and 2 thyme sprigs. Cook over medium-low heat for 1 minute until fragrant.
  7. Step 7 - 🫐🍷🫙
    Add the chicken stock, apple cider vinegar, and 1/4 cup blackberries to the skillet. Gently crush the berries and simmer for 2 to 3 minutes until slightly reduced and glossy. Strain if desired, then swirl in the remaining 1 tablespoon butter.
  8. Step 8 - 🫒🫛🌿
    Heat the olive oil in a separate pan over medium heat. Add the blanched haricots verts and the leaves from the remaining thyme sprigs. Toss for 2 minutes until tender-crisp and lightly coated. Season with a pinch of salt.
  9. Step 9 - 🔪🍽️🫐
    Slice the rested duck breasts on the bias. Spoon the celery root purée onto two plates, arrange the duck on top, add the haricots verts on the side, and place the remaining blackberries on the plates for garnish.
  10. Step 10 - 🥄🧂✨
    Spoon the blackberry-thyme jus around and over the duck. Finish with flaky salt and serve right away.

Additional

For an even more dramatic plate, use a very dark ceramic dish so the pale purée and berries pop in photos. If duck is unavailable, this works beautifully with skin-on chicken thighs, though duck gives the most luxurious French feel. Save the rendered duck fat for roasting radishes or sautéing eggs another day.