Zucchini & Squash Casserole
Healthy, simple, and fabulous, this Zucchini & Squash Casserole is the best healthy recipe for summer squash. Perfect for summer picnics and potlucks, this easy casserole also shines as a side dish for any holiday dinner!
Why You’ll Love This Recipe
- Quick Preparation: This Zucchini & Squash Casserole comes together in just 15 minutes of prep time, making it ideal for busy cooks.
- Versatile Dish: Serve it as a side or as a light main dish, perfect for any occasion or meal.
- Flavorful and Healthy: The combination of zucchini and yellow squash provides essential nutrients without sacrificing taste.
- Gluten-Free Option: Using gluten-free Panko breadcVanilla Extract (Alcohol-Free)bs ensures everyone can enjoy this dish.
- Family-Friendly: The mild flavors appeal to both kids and adults, making it a hit at family gatherings.
Tools and Preparation
To make your cooking experience easier, gather the following tools. Having the right equipment can streamline your process and enhance your results.
Essential Tools and Equipment
- Non-stick cooking spray
- 9-inch square baking dish
- Knife
- Cutting board
- Mixing bowl
Importance of Each Tool
- Non-stick cooking spray: Prevents sticking, ensuring easy removal of the casserole from the baking dish.
- Baking dish: Provides even cooking and browning for your casserole.
- Knife: Essential for slicing vegetables uniformly, ensuring even cooking throughout the dish.

Ingredients
For the Casserole
- 2 lbs. summer squash (zucchini and yellow squash, cut into ¼-inch slices)
- 2 ½ Tbsp. olive oil
- 1 ¼ tsp. salt (divided)
- ½ tsp. pepper
- ⅓ cup Parmesan cheese (grated)
- ⅓ cup Panko breadcVanilla Extract (Alcohol-Free)bs (gluten-free)
- ¼ tsp. garlic powder
- 2 Tbsp. fresh parsley (finely chopped)
How to Make Zucchini & Squash Casserole
Step 1: Preheat the Oven
Preheat your oven to 350 degrees Fahrenheit.
Step 2: Prepare the Vegetables
- Cut yellow squash and zucchini into thin, ¼-inch slices.
- Sprinkle ½ teaspoon salt over the sliced zucchini and squash. Let sit for 10 minutes.
- After 10 minutes, dab the slices with a paper towel to remove excess moisture.
Step 3: Assemble the Casserole
- Spray a 9-inch square baking dish with non-stick cooking spray.
- Arrange the zucchini and squash slices in overlapping rows within the baking dish.
- Drizzle olive oil over the arranged vegetables and sprinkle with remaining salt and pepper.
Step 4: Add Toppings
- In a small bowl, combine Parmesan cheese, Panko breadcVanilla Extract (Alcohol-Free)bs, and garlic powder.
- Toss well to mix and then sprinkle evenly over the zucchini and squash layers.
Step 5: Bake
- Cover the baking dish with aluminum foil.
- Bake in preheated oven for 30 minutes.
Step 6: Broil for Crispiness
- After baking, remove the foil.
- Turn your oven’s heat to High broil.
- Broil for an additional 5-7 minutes until the topping turns golden brown.
Step 7: Serve
Garnish with freshly chopped parsley before serving immediately. Enjoy your delicious Zucchini & Squash Casserole!
How to Serve Zucchini & Squash Casserole
Zucchini and Squash Casserole is a versatile dish that can be enjoyed in various ways. Whether you’re hosting a summer picnic or serving it at a holiday dinner, these serving suggestions will help you present this delicious casserole in style.
Pair with Grilled Proteins
- Chicken Breasts: Grilled chicken breasts complement the flavors of zucchini and squash perfectly.
- Steak: A juicy steak adds richness that balances the lightness of the casserole.
- Fish: Consider serving with grilled or baked fish for a healthy, sophisticated meal.
Fresh Salads
- Garden Salad: A simple garden salad enhances your meal with fresh greens and vibrant colors.
- Caprese Salad: The combination of fresh mozzarella, tomatoes, and basil pairs beautifully with the casserole.
Bread Options
- Garlic Bread: Crunchy garlic bread is great for scooping up any leftovers from your plate.
- Dinner Rolls: Soft, warm rolls are perfect for soaking up the flavors of the casserole.
Dipping Sauces
- Ranch Dressing: A creamy ranch dressing adds a delightful contrast to the dish’s textures.
- Chimichurri Sauce: This herb-based sauce brings a zingy flavor that lifts the whole meal.
How to Perfect Zucchini & Squash Casserole
To make your Zucchini and Squash Casserole even more delightful, follow these tips for perfection.
- Use Fresh Ingredients: Fresh zucchini and squash yield the best flavor and texture in your casserole.
- Slice Evenly: Cutting your vegetables into uniform ¼-inch slices ensures even cooking throughout.
- Season Generously: Don’t hesitate to adjust salt and pepper to suit your taste; these enhance the overall flavor.
- Experiment with Cheese: Try different types of cheese like feta or cheddar for unique flavor twists.
- Add Extra Vegetables: Incorporate bell peppers or spinach for added nutrition and variety.
- Make Ahead: Prepare your casserole ahead of time and bake it just before serving for convenience.
Best Side Dishes for Zucchini & Squash Casserole
Pairing side dishes with your Zucchini and Squash Casserole can elevate your meal. Here are some great options:
- Grilled Asparagus: Tender asparagus spears grilled to perfection add a lovely crunch.
- Quinoa Salad: A refreshing quinoa salad provides a nutritious grain option with vibrant veggies.
- Roasted Sweet Potatoes: Their natural sweetness complements the savory flavors of the casserole.
- Sautéed Green Beans: Crisp green beans tossed in olive oil add color and crunch to your plate.
- Coleslaw: A tangy coleslaw offers a refreshing contrast to the warm casserole.
- Corn on the Cob: Juicy corn on the cob is a classic summer side that pairs well with any meal.
Common Mistakes to Avoid
Creating a perfect Zucchini & Squash Casserole can be simple, but some common mistakes can lead to less-than-ideal results. Here are a few pitfalls to avoid:
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Bold preparation: Not slicing the zucchini and squash evenly can result in uneven cooking. Ensure each slice is about ¼ inch thick for consistent texture.
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Bold seasoning oversight: Forgetting to season adequately can leave your casserole bland. Always sprinkle salt and pepper generously to enhance the flavors.
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Bold moisture management: Skipping the step of removing excess moisture from the vegetables can make your casserole watery. Dab the slices with a paper towel after salting them.
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Bold overcooking: Baking too long without monitoring can lead to mushy vegetables. Keep an eye on the casserole during broiling to achieve that perfect golden brown topping.
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Bold ingredient substitutions: Using regular breadcrumbs instead of gluten-free Panko may alter the dish’s texture if you’re aiming for a gluten-free option. Stick with Panko for optimal crunch.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container.
- Zucchini & Squash Casserole can be refrigerated for up to 3 days.
Freezing Zucchini & Squash Casserole
- Use freezer-safe containers or heavy-duty freezer bags.
- It can be frozen for up to 2 months; ensure it’s completely cooled before freezing.
Reheating Zucchini & Squash Casserole
- Oven: Preheat oven to 350°F and cover with foil while reheating for about 20 minutes.
- Microwave: Heat in short intervals, stirring occasionally, until warmed through.
- Stovetop: Place in a pan over low heat, stirring frequently until hot.
Frequently Asked Questions
Here are some common questions about making Zucchini & Squash Casserole:
Can I add other vegetables to my Zucchini & Squash Casserole?
Yes! Feel free to include veggies like bell peppers or onions for additional flavor and nutrition.
How do I make my Zucchini & Squash Casserole vegan?
You can substitute Parmesan cheese with nutritional yeast or a plant-based cheese alternative.
Is Zucchini & Squash Casserole gluten-free?
If you use gluten-free Panko breadcrumbs, this casserole is indeed gluten-free!
Can I prepare Zucchini & Squash Casserole ahead of time?
Absolutely! You can assemble it a day in advance and bake it just before serving.
What dishes pair well with Zucchini & Squash Casserole?
This dish makes a great side alongside grilled chicken or steaks, adding a vibrant touch to any meal.
Final Thoughts
This Zucchini & Squash Casserole is not only healthy but also versatile—perfect for summer gatherings or holiday meals. Feel free to customize it by adding your favorite herbs or veggies. Try it out, and enjoy the delicious flavors!
Zucchini & Squash Casserole
Indulge in the delightful taste of Zucchini & Squash Casserole, a healthy and easy-to-make dish perfect for summer gatherings and family meals alike. This colorful casserole combines tender zucchini and yellow squash with a crunchy topping, creating a satisfying side or light main dish that everyone will love. With just 15 minutes of prep time, you can whip up this nourishing recipe that’s gluten-free and packed with flavor. Whether served at picnics or holiday dinners, this casserole is sure to be a crowd-pleaser!
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: Serves approximately 6
- Category: Side Dish
- Method: Baking
- Cuisine: American
Ingredients
- 2 lbs. summer squash (zucchini and yellow squash, cut into ¼-inch slices)
- 2 ½ Tbsp. olive oil
- 1 ¼ tsp. salt (divided)
- ½ tsp. pepper
- ⅓ cup grated Parmesan cheese
- ⅓ cup gluten-free Panko breadcrumbs
- ¼ tsp. garlic powder
- 2 Tbsp. fresh parsley (finely chopped)
Instructions
- Preheat your oven to 350°F.
- Slice the zucchini and yellow squash into thin, ¼-inch rounds. Sprinkle with ½ teaspoon salt and let sit for 10 minutes before patting dry with a paper towel.
- Spray a baking dish with non-stick cooking spray and layer the sliced vegetables evenly. Drizzle with olive oil and season with remaining salt and pepper.
- In a separate bowl, mix Parmesan cheese, Panko breadcrumbs, and garlic powder, then sprinkle over the vegetable layers.
- Cover with foil and bake for 30 minutes. Remove foil and broil on high for an additional 5-7 minutes until golden brown.
- Serve garnished with parsley.
Nutrition
- Serving Size: 1 serving
- Calories: 150
- Sugar: 3g
- Sodium: 400mg
- Fat: 8g
- Saturated Fat: 2g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 17g
- Fiber: 4g
- Protein: 4g
- Cholesterol: 10mg