Cheesy Baked Zucchini Gratin

A creamy and cheesy zucchini gratin that transforms humble ingredients into a luxurious dish perfect for any table.

Prep Time20

Cook Time30

Total Time50

Course: Main Course, Side Dish

Cuisine: French, Italian

Keyword: Cheesy Gratin, comfort food, Vegetarian, Zucchini Gratin

Servings: 6 servings

Calories: 350kcal

4 medium zucchinis These fresh, vibrant green vegetables provide a tender bite and a subtle sweetness.
1 tsp salt This crucial ingredient draws out excess moisture, ensuring a perfect texture.

1 tbsp olive oil Adds a fruity aroma and richness that elevates the entire dish.
1 small onion, finely chopped Infuses the gratin with a sweet yet savory essence.
2 cloves garlic, minced Offers a robust aroma that complements the creaminess.
200 ml heavy cream This thick, velvety liquid is essential for creating that luxurious sauce.
1 tsp Dijon mustard Introduces a mild tartness that perfectly balances the flavors.
1/4 tsp nutmeg A pinch of this warm spice adds a unique depth to the gratin.
to taste salt and pepper Essential for enhancing every flavor present.

1 cup shredded mozzarella Provides a gooey, stretchy texture that is irresistible.
1/2 cup grated Parmesan Contributes a salty, nutty undertone, enhancing richness.
1/2 cup shredded Gruyère or cheddar Offers a deeper layer of flavor, elevating the gratin to new heights.
2 tbsp chopped fresh parsley or chives Adds a burst of color and freshness on top.
to taste Extra Parmesan for top (optional) A final touch for those cheese lovers who crave additional crunch and flavor.

Prepare the zucchini by laying zucchini slices on a tray, sprinkling them with salt. Allow them to sit for 15–20 minutes to draw out excess moisture. Once done, pat them dry with paper towels.

In a skillet, heat olive oil over medium heat. Sauté the finely chopped onion until soft, then add the minced garlic. Cook for an additional minute.
Add heavy cream, Dijon mustard, nutmeg, salt, and pepper into the skillet. Simmer for 2–3 minutes before removing from heat.
Preheat the oven to 200°C (400°F). Grease a baking dish, layer zucchini slices, spoon cream sauce over them, and scatter cheese on top. Repeat for 2–3 layers.
Finish with remaining cheese and a sprinkle of Parmesan. Bake uncovered for 25–30 minutes until gratin turns golden and bubbles.
Let cool slightly, then top with chopped herbs. Serve warm and enjoy.

For a healthier twist, consider low-fat cream or swap some cheese for vegetables. This dish freezes well for up to 3 months.