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Cheesy Zucchini Bake with Gruyère and Parmesan Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.8 from 101 reviews
  • Author: Lisa
  • Prep Time: 15 minutes
  • Cook Time: 40 minutes
  • Total Time: 55 minutes
  • Yield: 8 servings 1x
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

This Zucchini Bake is a delicious, cheesy casserole perfect for a comforting side or light main dish. Featuring grated zucchini combined with eggs, gruyere, parmesan, and a crispy breadcrumb topping, it’s baked to golden perfection and full of savory flavors with hints of garlic, cayenne, and nutmeg.


Ingredients

Scale

Main Ingredients

  • 1 tablespoon extra-virgin olive oil
  • 1 small yellow onion, diced
  • 2 ½ pounds zucchini, grated
  • 4 large eggs
  • 6 ounces gruyere cheese, grated (about 1 3/4 cups)
  • ¾ cup freshly grated Parmesan cheese
  • 1 cup panko breadcrumbs
  • 2 teaspoons sea salt
  • 1 teaspoon Dijon mustard
  • 1 teaspoon garlic powder
  • ½ teaspoon freshly cracked black pepper
  • ¼ teaspoon cayenne pepper
  • ¼ teaspoon ground nutmeg

Topping

  • 2 tablespoons salted butter, melted

Additional

  • Nonstick cooking spray (for greasing the baking dish)

Instructions

  1. Preheat and Prepare Dish: Preheat your oven to 375°F. Grease a 9 x 13-inch baking dish lightly with nonstick cooking spray or olive oil to prevent sticking.
  2. Sauté Onion: Heat the olive oil in a medium skillet over medium heat. Once hot, add the diced onion and cook, stirring occasionally, until softened, about 4 minutes. Remove from heat and set aside.
  3. Prepare Zucchini: Place the grated zucchini in the center of a clean kitchen towel. Wrap and squeeze firmly over the sink to remove excess liquid, ensuring the bake is not watery.
  4. Mix Ingredients: In a large bowl, combine the squeezed zucchini, sautéed onion, eggs, grated gruyere, ⅓ cup Parmesan, ½ cup breadcrumbs, sea salt, Dijon mustard, garlic powder, black pepper, cayenne pepper, and ground nutmeg. Stir until well incorporated.
  5. Assemble in Dish: Transfer the mixture to the prepared baking dish and spread into an even layer for uniform baking.
  6. Prepare Topping: In a small bowl, mix the melted butter with the remaining ¼ cup Parmesan and ½ cup breadcrumbs. Evenly sprinkle this mixture over the top of the zucchini casserole for a crispy golden crust.
  7. Bake: Place the casserole in the oven and bake for 40 minutes, or until the center is set and the top is golden brown.
  8. Serve: Remove from oven and serve warm directly from the casserole dish for best taste and texture.
  9. Freeze (Optional): Allow the casserole to cool completely. Transfer to a freezer-safe container, cover with plastic wrap and foil, and freeze for up to 1 month. To reheat, thaw overnight in the refrigerator, then bake at 350°F for 35 minutes covered with foil, remove foil, and bake another 15 minutes until the top is golden and crispy.

Notes

  • Be sure to squeeze out as much liquid from the zucchini as possible to avoid a soggy casserole.
  • You can substitute the gruyere with another mild melting cheese like mozzarella if preferred.
  • For a spicier version, increase the cayenne pepper slightly.
  • This bake can be served as a side or a vegetarian main dish.
  • Freeze leftovers for convenient future meals without loss of flavor or texture.

Nutrition

  • Serving Size: 1/8 of casserole
  • Calories: 220
  • Sugar: 3g
  • Sodium: 520mg
  • Fat: 14g
  • Saturated Fat: 7g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 14g
  • Fiber: 2g
  • Protein: 12g
  • Cholesterol: 140mg