Parmesan Zucchini Gratin

Parmesan Zucchini Gratin | GI 365

Parmesan Zucchini Gratin | GI 365

We’re deep in zucchini season around here, with more than I could possible use up! This gratin makes short work of a few zucchini at a time, not to mention, it’s crispy-cheesy delicious! Zucchini and summer squash are often thought of as boring vegetables, but I think it makes them the perfect vehicle for all kinds of flavor combinations.

Parmesan Zucchini Gratin | GI 365 Parmesan Zucchini Gratin | GI 365

I used a zucchini and a golden summer squash for contrasting colors, but you could use any combination of summer squash.

Parmesan Zucchini Gratin | GI 365

First, remove both ends of the squash, and then cut them into 1/4″ thick sliced rounds.

Parmesan Zucchini Gratin | GI 365 Parmesan Zucchini Gratin | GI 365 Parmesan Zucchini Gratin | GI 365

For the herbs, remove the leaves from the woody stems and then finely chop. You will have about 2 Teaspoon of chopped herbs total. It doesn’t matter too much if the measurements for the herbs is perfectly accurate. The main idea is about a mixture of flavors from the rosemary, thyme, oregano, and sage.

Note: I have lots of fresh herbs in my garden right now and I love this combination. But…if you don’t have a bunch of herbs at your disposal, just use 2 Teaspoons one of the herbs called for, (rosemary is particularly good if you’re using just one).

Parmesan Zucchini Gratin | GI 365 Parmesan Zucchini Gratin | GI 365

Next, arrange the squash in a 9″ pie plate and sprinkle with the chopped herbs. I like to put the herbs under the topping to protect them from direct heat in the oven.

Parmesan Zucchini Gratin | GI 365

For the topping, mix the parmesan with the ground flax meal, sea salt, and pepper. Finally, sprinkle the topping over the squash and drizzle with the olive oil.

Parmesan Zucchini Gratin | GI 365

The gratin is done in about 25 minutes when it’s golden, bubbly, and the squash is just tender.

Parmesan Zucchini Gratin | GI 365

Enjoy this gratin crispy-crunchy, right out of the oven as a side dish or as the main entrée with a big green salad!

Parmesan Zucchini Gratin
Prep time
Cook time
Total time
Serves: 2-4
  • 1½ pounds zucchini and/or summer squash
  • 2 Teaspoons rosemary leaves, loosely packed
  • ½ Teaspoon thyme leaves
  • ½ Teaspoon oregano leaves, loosely packed
  • 1 small sage leaf
  • ½ Teaspoon sea salt
  • ¼ Teaspoon black pepper, freshly ground
  • 6 Tablespoons Parmesan, grated
  • 1 Tablespoon ground flax meal, (I used golden flax meal)
  • 1 Tablespoon olive oil
  1. Preheat the oven to 450F.
  2. Remove the ends from the squash and slice into ¼" thick sliced rounds.
  3. Finely chop all of the herbs, you will have about 2 Teaspoons.
  4. Arrange the squash in a 9" pie plate and sprinkle the herbs over the top.
  5. Mix together the salt, pepper, Parmesan, and flax meal. Sprinkle the topping over the zucchini and drizzle with the olive oil.
  6. Bake for 20-25 minutes, or until the gratin is golden and the squash is just tender. Serve immediately.
This serves 2 as an entrée with a big salad, and 4 as a side dish.

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2 Comments on “Parmesan Zucchini Gratin”

  1. Terri Mountjoy-Pepka

    Hi, Kari – so happy to have found you! My grandparents homesteaded in the Flathead and I recently returned from a family reunion there in the Hot Springs/Lonepine end of the valley where I fell in love with it all over again! Looking forward to more great inspiration :)

    1. Kari

      It’s great to hear from you – I think you’d like our adventure section because we post a lot of Montana adventures and Glacier National Park!

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