How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Zucchini au Gratin?

You need 8 ingredients. The key ingredients include: 4 medium-size zucchini, about 1 1/4 pounds total, Salt and freshly ground pepper to taste, 2 tablespoons olive oil, 1/2 cup white onions, sliced thin, and more.

Is Zucchini au Gratin suitable as vegetarian?

Yes, Zucchini au Gratin falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Zucchini au Gratin?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Zucchini au Gratin Recipe

Name: Zucchini au Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 medium-size zucchini, about 1 1/4 pounds total; Salt and freshly ground pepper to taste; 2 tablespoons olive oil; 1/2 cup white onions, sliced thin; 1 tablespoon finely chopped garlic; 2 teaspoons finely chopped fresh rosemary leaves, or 1 teaspoon dried; 2 tablespoons finely chopped parsley; 4 tablespoons Parmesan or Gruyere cheese

Try this homemade Zucchini au Gratin recipe the whole family will love. Made with zucchini, Salt, olive oil and white onions. Easy step-by-step instruct…

This Zucchini au Gratin relies on simple, everyday ingredients such as olive oil, white onions, sliced thin, finely chopped garlic and finely chopped parsley. It comes together quickly and makes 4 servings, at about 172 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Vegetarian

Servings: persons

4 medium-size zucchini, about 1 1/4 pounds total
Salt and freshly ground pepper to taste
2 tablespoons olive oil
1/2 cup white onions, sliced thin
1 tablespoon finely chopped garlic
2 teaspoons finely chopped fresh rosemary leaves, or 1 teaspoon dried
2 tablespoons finely chopped parsley
4 tablespoons Parmesan or Gruyere cheese

Frequently Asked Questions

Quick Info

Servings
4 servings
Calories
172 kcal
Category
Vegetarian

Eats Now Editorial Team

Recipe developed & tested in-house

Passionate cooks who develop and test new recipes every day – from quick weeknight dinners to special occasion feasts.

Reviewed by the Eats Now Kitchen Team

More about our team →

Zucchini au Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions