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Healthy summer vegetable casserole with zucchini and squash slices layered and baked in a rustic dish.

Healthy Summer Vegetable Casserole with Zucchini & Squash


  • Total Time: 50 minutes
  • Yield: 6 servings 1x

Description

A light, flavorful summer casserole layered with fresh zucchini, yellow squash, tomatoes, herbs, and a crispy cheese-breadcrumb topping. Perfect as a side or a meatless main.


Ingredients

Scale
  • 2 medium zucchini, thinly sliced
  • 2 medium yellow squash, thinly sliced
  • 23 ripe tomatoes, sliced
  • 1 small onion, thinly sliced
  • 2 tablespoons olive oil
  • ½ teaspoon sea salt
  • ¼ teaspoon freshly ground black pepper
  • 1 teaspoon dried Italian herbs
  • ½ cup grated Parmesan cheese
  • ½ cup shredded mozzarella (optional)
  • ½ cup breadcrumbs
  • 2 tablespoons fresh parsley, chopped

  • Instructions

    1. Preheat the oven to 375°F (190°C) and lightly oil an 8×8-inch baking dish.

    2. Arrange half of the sliced onions on the bottom of the dish.

    3. Layer zucchini, squash, and tomato slices in an overlapping pattern, seasoning each layer with salt, pepper, and Italian herbs.

    4. Sprinkle Parmesan and mozzarella (if using) evenly over the top.

    5. Top with breadcrumbs and drizzle with olive oil.

    6. Bake uncovered for 30–35 minutes until vegetables are tender and the topping is golden brown.

    7. Allow the casserole to rest for 5–10 minutes, then garnish with fresh parsley before serving.

    • Prep Time: 15 minutes
    • Cook Time: 35 minutes

    Nutrition

    • Calories: 200
    • Sodium: 300
    • Fat: 10
    • Carbohydrates: 20
    • Protein: 8