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Zucchini Gratin

Zucchini Gratin

This delicious zucchini gratin recipe has a delectable crispy Parmesan and breadcrumb topping and is made without any butter or cream, allowing the fresh zucchini flavor to shine. Slice the zucchini uniformly to ensure even cooking.


4 servings, 1 cup each

Prep Time

15 minutes

Total Time

45 minutes


  • 2cloves garlic, minced
  • 3tablespoons extra-virgin olive oil, divided
  • 1teaspoon dried marjoram or thyme
  • 1/4teaspoon salt
  • 1/4teaspoon freshly ground pepper
  • 3medium zucchini, thinly sliced (1/8 inch)
  • 1/2cup coarse dry breadcrumbs, preferably whole-wheat
  • 1/2cup grated Parmesan cheese


  1. Position rack in lower third of oven; preheat to 450°F. Coat a 7-by-11-inch baking dish (or similar size 2- to 2 1/2-quart dish) with cooking spray.
  2. Combine garlic, 1 tablespoon oil, marjoram (or thyme), salt and pepper in a large bowl. Add zucchini; toss until evenly coated. Transfer to the prepared baking dish.
  3. Roast the zucchini until softened and starting to wilt in spots, about 15 minutes.
  4. Meanwhile, combine breadcrumbs, Parmesan and the remaining 2 tablespoons oil in the bowl. Sprinkle the breadcrumb mixture over the zucchini and continue to bake until the topping is crisp, about 15 minutes more.


To make your own fresh breadcrumbs, trim crusts from whole-wheat bread. Tear bread into pieces and process in a food processor until coarse crumbs form. To make fine breadcrumbs, process until very fine. To make dry breadcrumbs, spread coarse or fine breadcrumbs on a baking sheet and bake at 250°F until dry, about 10 to 15 minutes. One slice of bread makes about 1/2 cup fresh breadcrumbs or about 1/3 cup dry breadcrumbs.

Nutrition Facts

Per serving (recipe makes 4 servings, 1 cup each)

Calories 201kcal
Carbohydrate Total 13g
Total Sugars 4g
Added Sugars 0g
Fiber 2g
Total Fat 14g
Saturated Fat 3g
Mono Saturated Fat 9g
Cholesterol 9mg
Sodium 322mg
Protein 7g
Potassium 406mg
Calcium 141mg
Folate 37mcg
Omega-6 1g
Vitamin E 2mg
Zinc 1mg
Vitamin B3 1mg