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Zucchini and Vegetable Gratin Recipes

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Zucchini is one veggie that people with gardens seem to have in abundance as the summer ends. While it’s always nice to slice them and toss them in a salad, or make (yet another) ever enjoyable zucchini bread, I was looking to make something a bit more on the healthy side. And then it hit me – zucchini, tomato and potato gratin! Not only is it a great way to layer the flavors of some yummy veggies (okay, and cheese, too) but it was super healthy as well.

Zucchini and Vegetable Gratin Recipes

What is a Gratin?

According to Wikipedia, “Gratin is a widespread culinary technique in food preparation in which an ingredient is topped with a browned crust, often using breadcrumbs, grated cheese, egg and/or butter. Gratin originated in French cuisine and is usually prepared in a shallow dish of some kind. A gratin is baked or cooked under an overhead grill or broiler to form a golden crust on top and is traditionally served in its baking dish.” Here, I’ve used summer vegetables to make an all vegetable gratin. I used olive oil, but you can use butter. I opted out of using egg, as it wouldn’t have complimented this dish. I just wanted each vegetable to come through and taste as it should – like summer!

Zucchini and Vegetable Gratin

Zucchini and Vegetable Gratin Recipes

If you have a food processor you can make sliced potatoes, or whatever else you need to slice, for that matter, in NO time! I sliced about 6 medium baking potatoes here. My first choice was to use the creamier variety, a red potato. But, use what you have, right?

Zucchini and Vegetable Gratin Recipes

Using the same technique as with the potatoes, I sliced the zucchini and yellow squash. I cut the red and yellow tomatoes by hand. I’m sure going to miss these nice home grown tomatoes from the summer!

Zucchini, Potato and Tomato Gratin

Ingredients:

*special note for both types of gratin. Times will vary depending on how thick your vegetables are sliced. I used my food processor to cut uniform 1/8th inch slices, so my timing reflects a proper cooking time for that size. If you have a thicker cut on your veggies, you will need to check for proper tenderness in the gratin.

  • 2 small zucchini squash, sliced about 1/8th inch thick
  • 2 small yellow squash, sliced about 1/8th inch thick
  • 2-3 baking potatoes, or 4-6 red potatoes, sliced about 1/8th inch thick
  • 1 cup cherry or grape tomatoes, halved
  • salt and freshly ground pepper
  • 1/2 cup Asiago cheese, grated
  • olive oil

Instructions:

  1. Preheat oven to 325 degrees.
  2. Drizzle olive oil inside a shallow baking dish making sure the oil coats the sides.
  3. Layer in the sliced zucchini, yellow squash and the potato alternating vegetables in a circular pattern until reaching the center of the dish.
  4. Top gratin with sliced tomatoes.
  5. Season with salt and fresh ground pepper.
  6. Sprinkle with cheese.
  7. Pour about two tablespoons of water in the gratin dish so veggies can steam just a bit from the bottom up while cooking, but not much more than that, or they will not brown properly.
  8. Drizzle about 2-3 tablespoons olive oil on top of the fully assembled dish.
  9. Bake for about 20 minutes.
  10. Check to see that top is brown with a light crust.
  11. Cool for about 10 minutes before eating.
Zucchini and Vegetable Gratin Recipes

This is where you start layering those pretty veggies! Just alternate and move around in concentric circles, pretend that you are waaaay creative. Don’t tell anyone how easy it really is! It is at this point that I added the kosher sea salt, fresh ground pepper, and the grated Asiago cheese. Some freshly chopped herbs would also be very nice here, too.

And, here is another type of gratin for you! Zucchini, potato and sweet onion. This one has goat cheese to really flavor it up!

Zucchini and Vegetable Gratin Recipes

Zucchini, Potato and Sweet Onion Gratin

Ingredients:

  • 2 small zucchini squash, sliced about 1/8th inch thick
  • 2 small yellow squash, sliced about 1/8th inch thick
  • 2-3 baking potatoes (or 4-6 red potatoes, sliced about 1/8th inch thick)
  • 1 Sweet (Vidalia) onion, sliced about 1/8th inch thick
  • salt and pepper
  • 1package (about 2 oz) plain goat cheese, crumbled
  • olive oil

Instructions:

  1. Preheat oven to 325 degrees.
  2. Drizzle olive oil inside a shallow baking dish making sure the oil coats the sides.
  3. Layer in the sliced zucchini, yellow squash and the potato alternating vegetables in a circular pattern until reaching the center of the dish.
  4. Tuck slices of sweet onion in and around the gratin, and place a few on top.
  5. Season with salt and fresh ground pepper.
  6. Sprinkle with goat cheese.
  7. Pour about two tablespoons of water in the gratin dish so veggies can steam just a bit from the bottom up while cooking, but not much more than that, or they will not brown properly.
  8. Drizzle about 2-3 tablespoons olive oil on top of the fully assembled dish.
  9. Bake for about 20 minutes.
  10. Check to see that top is brown with a light crust.
  11. Cool for about 10 minutes before eating.
Zucchini and Vegetable Gratin Recipes

After it is all baked, this dish makes a great lunch with soup or a perfect side at dinner. You can change up any of the veggies you like, the key is to slice them all the same thickness so the dish can cook to the right tenderness throughout. It is easy to change the cheese, pick a favorite! Toss in a handful buttered breadcrumbs with the cheese to make more of a crusty/crumbly topping. Hmm. With fall right around the corner, maybe I’ll try some carrot and butternut squash next time?

Zucchini and Vegetable Gratin Recipes

What do you do with leftover zucchini or summer squash?

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