Delicious Keto Eggplant and Zucchini Gratin Recipe: A Low-Carb Dinner Delight

Indulge in a Keto-Friendly Classic: Eggplant and Zucchini Gratin

Embark on a culinary journey with the Keto Eggplant and Zucchini Gratin, a dish that masterfully combines the comfort of traditional gratin with the health-conscious approach of a keto diet. This recipe is not just a feast for your taste buds but also aligns with your nutritional goals, offering a low-carb, high-fat meal that’s both satisfying and guilt-free. Perfect for a family dinner or as a show-stopping side, this gratin is poised to become a staple in your keto recipe collection.

Keto Eggplant and Zucchini Gratin

The Essence of Keto Cooking: Eggplant and Zucchini Gratin

Rooted in my passion for reimagining classic dishes to fit a ketogenic lifestyle, the Keto Eggplant and Zucchini Gratin was born from the desire to enjoy the creamy, cheesy goodness of a traditional gratin without the carb overload. By swapping out starchy potatoes for nutrient-dense eggplant and zucchini, this dish maintains the gratifying texture and flavor of the original while staying true to keto principles.

Eggplants and zucchinis are low in carbs and high in fiber, making them ideal for a keto diet. They are also rich in vitamins and antioxidants, providing a nutritional boost. The combination of heavy cream and cheese in the gratin introduces a luxurious richness and a good amount of healthy fats, crucial for achieving ketosis. The use of olive oil not only adds a depth of flavor but also contributes monounsaturated fats, which are beneficial for heart health.

Let’s not forget the herbs and spices. Fresh thyme lends an aromatic touch, while garlic adds a punch of flavor without the carbs. A pinch of nutmeg offers warmth and complexity to the dish, ensuring that every bite is a harmonious blend of flavors.

Sliced Eggplant and Zucchini

Mastering the Method: Tips for Perfect Keto Gratin

Creating the perfect Keto Eggplant and Zucchini Gratin is about understanding the subtle nuances that elevate a good dish to a great one. Here are some chef’s tips to ensure your gratin is a resounding success:

Preparation is Key: Begin by slicing the eggplant and zucchini uniformly. This ensures even roasting and cooking, providing a consistent texture throughout the gratin. Brushing the slices with olive oil not only prevents sticking but also helps them roast to perfection, bringing out their natural sweetness and depth of flavor.

Layering Technique: When assembling the gratin, take care to create even layers of vegetables and cheese. This not only presents a visually appealing dish but also guarantees that each forkful has the perfect balance of creamy cheese and tender vegetables. Pouring the flavored cream over each layer infuses the dish with garlic and thyme, marrying the flavors beautifully.

Baking to Perfection: The gratin should bake until the top is golden brown and bubbly, a sign that the cheeses have melted together and formed a delicious crust. Letting the gratin rest for a few minutes after baking allows it to set, making it easier to serve neat portions that hold their shape.

Keto Eggplant and Zucchini Gratin in Dish

Variations to Spice Up Your Gratin

Spicy Keto Gratin: Add a kick to your gratin by incorporating red pepper flakes into the cream mixture. The heat from the flakes will cut through the richness of the cheese and cream, adding a new dimension to the dish.

Meaty Keto Gratin: For an extra protein boost, layer cooked bacon or prosciutto between the vegetables. The saltiness of the meat complements the mild flavors of the eggplant and zucchini, while adding a satisfying crunch.

Herbaceous Keto Gratin: Experiment with different herbs such as rosemary or basil for a fresh twist. Fresh herbs bring a burst of flavor and can transform the profile of your gratin to suit your taste.

Substitutions for Dietary Needs

Dairy-Free Keto Gratin: Swap out heavy cream for coconut cream and use dairy-free cheese alternatives. These substitutions keep the dish keto-friendly while catering to those with dairy sensitivities or preferences.

Nut-Free Keto Gratin: If you’re avoiding nuts, simply omit the nutmeg. The dish will still be flavorful with the garlic and thyme, ensuring you don’t miss out on any of the gratin’s comforting qualities.

Nightshade-Free Keto Gratin: Replace eggplant with slices of butternut squash or pumpkin for a nightshade-free version. These alternatives offer a similar texture and are also low in carbs, making them suitable for a keto diet.

Frequently Asked Questions

Question Answer
Can I make this gratin ahead of time? Yes, you can assemble the gratin ahead of time and refrigerate it. Bake it just before serving for the best results.
How do I store leftovers? Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave.
Is this dish freezer-friendly? While you can freeze the gratin, the texture of the vegetables may change upon thawing. It’s best enjoyed fresh.
Can I use other vegetables? Absolutely! Feel free to incorporate other low-carb vegetables like cauliflower or mushrooms.
How can I make the top crustier? Sprinkle additional Parmesan cheese on top during the last 5 minutes of baking for a crispier crust.

Keto Eggplant and Zucchini Gratin

Savor the rich, comforting flavors of this Keto Eggplant and Zucchini Gratin, a perfect symphony of tender vegetables and creamy cheese topping. This dish is a low-carb delight, bringing you the essence of classic gratin without the guilt. Ideal for a cozy dinner or an impressive side dish, it's sure to satisfy your cravings for something hearty and delicious while keeping you on track with your keto lifestyle.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Course Dinner
Cuisine French-inspired
Servings 6
Calories 290 kcal


  • Baking sheet
  • Saucepan
  • Baking dish
  • Brush


  • 1 large Eggplant (about 1 lb / 450g), thinly sliced
  • 2 medium Zucchini (about 1 lb / 450g), thinly sliced
  • 1 cup Heavy cream (240 ml)
  • ½ cup Grated Parmesan cheese (50g)
  • 1 cup Shredded mozzarella cheese (100g)
  • 2 tablespoons Olive oil (30 ml)
  • 2 cloves Garlic, minced
  • 1 tablespoon Fresh thyme, chopped
  • 1 teaspoon Salt (5g)
  • ½ teaspoon Ground black pepper (2g)
  • Nutmeg, a pinch


  • Preheat your oven to 375°F (190°C).
  • Brush both sides of the eggplant and zucchini slices with olive oil, and season with salt and pepper.
  • Arrange the slices in a single layer on a baking sheet, and roast for 15 minutes, until slightly tender.
  • In a small saucepan, combine the heavy cream, minced garlic, nutmeg, and half of the thyme. Simmer on low heat for 5 minutes to infuse flavors.
  • In a greased baking dish, layer half of the roasted eggplant and zucchini slices. Sprinkle with half of the Parmesan and mozzarella cheese.
  • Pour half of the flavored cream over the first layer of vegetables and cheese.
  • Repeat the layers with the remaining vegetables, cheeses, and cream.
  • Top with the remaining thyme.
  • Bake in the preheated oven for 30 minutes, or until the top is golden brown and bubbly.
  • Allow the gratin to rest for 5 minutes before serving.


For best results, ensure the eggplant and zucchini slices are of even thickness to promote uniform cooking. If desired, sprinkle additional Parmesan cheese on top during the last 5 minutes of baking for a crispier crust. This dish can be made ahead and reheated, making it a convenient option for meal prep or entertaining guests.


Calories: 290kcalCarbohydrates: 9gProtein: 10gFat: 24gFiber: 3gNet Carbs: 6g
Keyword Keto Eggplant Zucchini Gratin, keto side dish, Low Carb Vegetable Bake
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