Description

Summer Vegetable Gratin is a vibrant and delicious dish that highlights the best of the season. Sliced zucchini, eggplant, and tomatoes are layered over sautéed leeks and covered with a flavorful herb–tomato sauce. Baked under a blanket of melted mozzarella, it’s equally perfect as a hearty side or a light vegetarian main—beautiful, nourishing, and supremely satisfying.

Ingredients

Vegetables & Cheese:

1 medium zucchini (about 390 g)

1 small eggplant (about 150 g)

2 medium tomatoes (about 238 g)

50 g thinly sliced leek leaves

2 tablespoons olive oil

½ cup grated mozzarella cheese (about 80 g)

For the Sauce:

2 tablespoons tomato paste

2 tablespoons water

½ teaspoon dried oregano

½ teaspoon dried thyme

½ teaspoon salt

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Instructions

Preheat Oven:
Preheat your oven to 400 °F (200 °C).
Sauté the Leeks:
In a skillet over medium heat, heat olive oil and sauté leeks until tender. Press them evenly into the bottom of an 8×8‑inch baking dish.
Layer the Vegetables:
Slice zucchini, eggplant, and tomatoes into ¼‑inch rounds. Arrange them in alternating layers over the bed of leeks.
Prepare & Pour the Sauce:
Whisk together tomato paste, water, oregano, thyme, and salt. Pour this herb‑tomato mixture evenly over the layered vegetables.
Bake Covered:
Cover the dish with foil and bake for 40 minutes, or until the vegetables are tender.
Add Cheese & Finish Baking:
Remove the foil and sprinkle mozzarella evenly over the top. Bake uncovered for 15 minutes, or until the cheese is golden and bubbling.
Rest & Serve:
Allow the gratin to rest for 10 minutes before serving. This helps it set and makes slicing easier.

Notes

Swap mozzarella for Gruyère, Parmesan, or crumbled feta for a flavor twist.
Layer in fresh basil, rosemary, or parsley to enhance the aroma.
Add chickpeas or white beans between the layers for a protein-rich version.
For crunch, top with a mix of breadcrumbs and olive oil before baking.
Go vegan by using dairy-free cheese or a sprinkle of nutritional yeast.

Prep Time: 20 minutes
Cook Time: 55 minutes
Category: Main Course
Method: Baking
Cuisine: American