Zucchini and Summer Squash Casserole is one of those dishes that transports me back to my grandmother’s bustling kitchen in Monterey. The warmth of the oven, the scent of fresh vegetables mingling with garlic and herbs—it’s a melody of flavors that sings the song of my family’s heritage. Growing up, my summers were spent in Nonna Rosa’s garden, where the zucchini seemed to multiply overnight, begging to be transformed into something delicious. This casserole is a tribute to those sun-drenched days and the culinary legacy that my grandmother and mother passed down to me. Now, as I share this recipe with you, I hope to bring a bit of that Monterey magic into your home.
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Why You’ll Love This Zucchini and Summer Squash Casserole
This Zucchini and Summer Squash Casserole is a symphony of flavors and textures that will delight your senses. It’s not just a side dish; it’s a celebration of the vibrant, fresh produce that summer has to offer. With its creamy, cheesy layers and a hint of garlic, this casserole is both comforting and nourishing. It’s a dish that effortlessly bridges the gap between rustic simplicity and gourmet delight. Whether you’re hosting a family gathering or simply indulging in a quiet dinner at home, this casserole will become a cherished favorite.
From my earliest memories, I recall my mother, Elena, improvising with whatever fresh produce was at hand, turning humble ingredients into masterpieces. This recipe embodies that spirit of creativity and resourcefulness. You’ll love how easily it comes together, yet how impressive it looks and tastes. It’s a dish that invites you to linger at the table, savoring every bite and the company of those you love.
Ingredients You’ll Need for This Zucchini and Summer Squash Casserole

- 2 medium zucchini, sliced into rounds
- 2 medium summer squash, sliced into rounds
- 1 medium onion, thinly sliced
- 3 cloves garlic, minced
- 1 cup cherry tomatoes, halved
- 1 cup grated Parmesan cheese
- 1 cup shredded mozzarella cheese
- 1/2 cup fresh basil leaves, chopped
- 1/4 cup olive oil
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 teaspoon dried oregano
- 1/4 cup breadcrumbs (optional for topping)
For those who prefer a different cheese, feel free to substitute with Gruyère or fontina for a unique twist. If you’re aiming for a gluten-free version, you can skip the breadcrumbs or use a gluten-free alternative.
Nutrition Facts
- Calories: 280 per serving
- Protein: 12g
- Fat: 18g
- Carbohydrates: 20g
- Fiber: 4g
- Sugar: 6g
- Sodium: 450mg
This casserole is not only delicious but also packed with nutrients. The zucchini and summer squash provide essential vitamins and minerals, while the cheese adds a good source of protein and calcium.
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Savor the Flavor of Zucchini and Summer Squash Casserole
Learn how to make delicious Zucchini and Summer Squash Casserole. Easy recipe with step-by-step instructions.
- Total Time: 45 minutes
- Yield: 4 servings 1x
Ingredients
- 2 medium zucchini, sliced into rounds
- 2 medium summer squash, sliced into rounds
- 1 medium onion, thinly sliced
- 3 cloves garlic, minced
- 1 cup cherry tomatoes, halved
- 1 cup grated Parmesan cheese
- 1 cup shredded mozzarella cheese
- 1/2 cup fresh basil leaves, chopped
- 1/4 cup olive oil
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 teaspoon dried oregano
- 1/4 cup breadcrumbs (optional for topping)
For those who prefer a different cheese, feel free to substitute with Gruyère or fontina for a unique twist. If you’re aiming for a gluten-free version, you can skip the breadcrumbs or use a gluten-free alternative.
Instructions
- Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with olive oil.
- In a large bowl, combine the zucchini, summer squash, onion, garlic, cherry tomatoes, and basil. Drizzle with olive oil and season with salt, pepper, and oregano. Toss until well coated.
- Layer half of the vegetable mixture in the prepared baking dish. Sprinkle half of the Parmesan and mozzarella cheese over the vegetables.
- Add the remaining vegetable mixture on top and sprinkle with the remaining cheeses. If using, evenly distribute the breadcrumbs over the top for an added crunch.
- Cover the dish with foil and bake for 25 minutes. Then, remove the foil and bake for an additional 15-20 minutes, or until the cheese is bubbly and golden brown.
- Let the casserole cool for a few minutes before serving. Garnish with additional basil if desired.
Remember the times when my daughters, Olivia and Isabella, would sit on the kitchen counter watching me cook? This is the perfect dish to involve little hands in the kitchen. They love arranging the vegetables in the dish and sprinkling on the cheese.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Main Dish
- Method: Cooking
- Cuisine: International
Steps to Create Your Zucchini and Summer Squash Casserole
- Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with olive oil.
- In a large bowl, combine the zucchini, summer squash, onion, garlic, cherry tomatoes, and basil. Drizzle with olive oil and season with salt, pepper, and oregano. Toss until well coated.
- Layer half of the vegetable mixture in the prepared baking dish. Sprinkle half of the Parmesan and mozzarella cheese over the vegetables.
- Add the remaining vegetable mixture on top and sprinkle with the remaining cheeses. If using, evenly distribute the breadcrumbs over the top for an added crunch.
- Cover the dish with foil and bake for 25 minutes. Then, remove the foil and bake for an additional 15-20 minutes, or until the cheese is bubbly and golden brown.
- Let the casserole cool for a few minutes before serving. Garnish with additional basil if desired.
Remember the times when my daughters, Olivia and Isabella, would sit on the kitchen counter watching me cook? This is the perfect dish to involve little hands in the kitchen. They love arranging the vegetables in the dish and sprinkling on the cheese.
Tips for Making the Best Zucchini and Summer Squash Casserole
For the best results, choose zucchini and summer squash that are firm and free of blemishes. If your garden is overflowing like Nonna Rosa’s used to, this is an excellent way to use up your bounty. To avoid a watery casserole, lightly salt the squash slices and let them sit for about 10 minutes, then pat them dry with a paper towel before assembling the dish.
Using fresh herbs like basil enhances the flavor immensely. If you only have dried herbs, reduce the quantity by half to avoid overpowering the dish. Remember, cooking is an art, not a science, so feel free to adjust the seasonings to suit your family’s taste.
Serving Suggestions and Pairings

This casserole pairs beautifully with a crisp green salad and a glass of chilled white wine, reminiscent of the leisurely lunches I enjoyed in the Italian countryside. For a heartier meal, serve it alongside a roasted chicken or grilled fish. The light, fresh flavors of the casserole complement a variety of proteins, making it a versatile addition to any meal.
During summer gatherings, I often serve this dish as part of a buffet, allowing guests to savor its vibrant flavors alongside other seasonal delights. It’s always a hit, with its colorful presentation and comforting aroma drawing people in.
Storage and Reheating Tips
Leftovers of this casserole can be stored in an airtight container in the refrigerator for up to three days. To reheat, simply place a portion in a microwave-safe dish and heat until warmed through, or cover with foil and reheat in a 350°F oven for about 15 minutes.
If you’re planning to make this dish ahead of time, assemble the casserole but hold off on baking. Cover it tightly and store it in the refrigerator for up to 24 hours. When you’re ready to enjoy, bake as directed, adding a few extra minutes to account for the chill.
Frequently Asked Questions
What are the main ingredients for Zucchini and Summer Squash Casserole?
The main ingredients for Zucchini and Summer Squash Casserole include the items listed in our ingredients section above. Each ingredient plays a crucial role in achieving the perfect flavor and texture.
How long does it take to make Zucchini and Summer Squash Casserole?
The total time to make Zucchini and Summer Squash Casserole includes both preparation and cooking time. Check the recipe card above for exact timing details.
Can I make Zucchini and Summer Squash Casserole ahead of time?
Yes, Zucchini and Summer Squash Casserole can often be prepared in advance. Store it properly in an airtight container in the refrigerator and consume within the recommended timeframe.
What can I serve with Zucchini and Summer Squash Casserole?
Zucchini and Summer Squash Casserole pairs well with various sides and accompaniments. Consider the serving suggestions mentioned in the recipe for the best dining experience.
Is Zucchini and Summer Squash Casserole suitable for special diets?
Depending on the ingredients used, Zucchini and Summer Squash Casserole may be adapted for various dietary needs. Check the ingredients list and consider substitutions as needed for your dietary requirements.
Final Thoughts
Creating this Zucchini and Summer Squash Casserole is like crafting a love letter to my family’s culinary traditions. Each layer of vegetables and cheese brings a touch of Monterey to your kitchen, a reminder of sunlit gardens and the joy of sharing a meal. I hope this dish brings you as much happiness as it has brought to my family. Whether you’re gathering loved ones around the table or enjoying a quiet meal, this casserole is sure to become a beloved staple in your home.