
Keto Baked Chicken with Creamy Leek, Gruyère and Sage over Zucchini Ribbons
An original keto recipe of oven-baked golden chicken breast finished with a creamy leek, Gruyère and sage sauce, served over buttery sautéed zucchini ribbons. It is elegant, comforting, and low in carbohydrates, perfect for a special weeknight dinner.
Important notice: This recipe is not medical advice. Consult your healthcare professional.
Ingredients
- 700 g chicken breast (skinless, en 4 pieces)
- 6 g salt (or to taste, divided)
- 2 g black pepper (freshly ground)
- 2 g garlic powder
- 15 ml olive oil
- 30 g butter (divided)
- 120 g leek (solo the parte blanca and verde claro, sliced finas)
- 6 g fresh sage (chopped finely)
- 180 ml heavy cream
- 90 g Gruyère cheese (grated)
- 10 g Dijon mustard
- 120 ml chicken broth
- 500 g zucchini (en cintas finas hechas with pelador or mandolina)
- 1 g nutmeg (freshly grated)
- 10 ml lemon juice (freshly squeezed)
Nutrition facts
per serving
Approximate nutritional information. Estimated from the recipe’s ingredients and amounts, using standard reference nutrition values. It may vary with brands, sizes and cooking method. For guidance only; not a substitute for medical or dietary advice.
Allergens
Instructions
- 1
Preheat the oven to 220 °C / 425 °F.
- 2
Pat the chicken breasts dry with paper towels and season both sides with 4 g of the salt, black pepper, and garlic powder.
- 3
Heat a large oven-safe skillet over medium-high heat. Add the olive oil and 15 g of the butter. Sear the chicken breasts for 2 minutes per side until lightly golden.
- 4
Transfer the skillet to the oven and bake the chicken for 10 to 14 minutes at 220 °C / 425 °F, or until fully cooked. Remove the chicken and let it rest for 5 minutes.
- 5
While the chicken rests, return the same skillet to medium heat. Add the remaining butter and the leek. Cook for 3 to 4 minutes, stirring, until the leek is tender.
- 6
Stir in the fresh sage and cook for 30 seconds to release its aroma.
- 7
Pour in the chicken broth and scrape the bottom of the skillet to dissolve the browned bits. Cook for 2 minutes to reduce slightly.
- 8
Add the heavy cream, Dijon mustard, and nutmeg. Cook over medium-low heat for 2 to 3 minutes until the sauce starts to thicken.
- 9
Add the shredded Gruyère gradually, stirring until fully melted. Stir in the lemon juice and adjust with the remaining 2 g salt if needed.
- 10
In another large skillet over medium-high heat, add the zucchini ribbons and sauté for 2 to 3 minutes, just until tender but still slightly firm. Toss them with a couple of spoonfuls of the hot sauce for extra flavor.
- 11
Serve a bed of zucchini ribbons on each plate, top with one chicken breast, and spoon over the creamy leek, Gruyère, and sage sauce.
Chef tips
For a silkier sauce, lower the heat before adding the cheese so it does not split. If the chicken breasts are very thick, butterfly or pound them slightly for even cooking.
Substitutions
You can substitute Gruyère with Emmental or aged Swiss cheese. Fresh sage can be replaced with a smaller amount of fresh thyme. Zucchini can be swapped for hearts of palm noodles or sautéed cabbage.
What I used to make it
Generic kitchen tools that work for this recipe. You don’t need to buy anything to make it.
Illustrative imageCosori Pro LE 5 Qt Air Fryer
Browning and baking with little oil
- Browns food with very little oil
- Handy for vegetables, chicken and reheating
- Check the basket capacity
Illustrative imageTempPro TP19H Digital Thermometer
Checking doneness of meat and chicken
- Checks doneness of meat and chicken
- Quick reading
- Clean the probe after each use
Illustrative imageT-fal Ultimate Hard Anodized 12" Non-Stick Pan
Eggs, omelets and stir-fries
- Eggs and omelets that don’t stick
- Comfortable, sturdy handle
- Use wooden or silicone utensils
As an Amazon Associate, I earn from qualifying purchases.
Ratings & reviews
Sign in to rate this recipe
Sign inRelated recipes

Keto Salmon Avocado Salad
27 min

Baked Eggs with Avocado
25 min

Keto Chicken Breasts Stuffed with Artichoke, Bacon and Fontina with Lemon Sage Butter
45 min

Keto Pork Tenderloin with Smoked Almond Crust and Rosemary Leek Cream
50 min

Keto Coconut Shrimp Skillet with Roasted Cauliflower and Lime
40 min

Creamy Keto Beef Skillet with Brussels Sprouts, Bacon, and Blue Cheese
45 min