When summer hands you an abundance of zucchini and squash, don’t panic—make a zucchini and squash casserole! This warm, comforting bake celebrates the very best of the season’s produce. It’s light enough for a July dinner but satisfying enough to feel like a real meal. And let’s be honest, who doesn’t love a recipe that requires minimal effort but delivers maximum flavour?
Perfect as a weeknight side or a centrepiece for a backyard gathering, this easy casserole fits seamlessly into your summer cooking lineup. Plus, it’s naturally gluten-free and easily doubled for feeding a crowd.
Why You’ll Love This Zucchini and Squash Casserole
- A perfect summer squash recipe when your garden’s overflowing
- Crisp topping meets tender, juicy veggies—what’s not to love?
- It’s a healthy vegetable bake with simple, wholesome ingredients
- Just one baking dish to clean (bonus!)
Ingredients
- 900 g (2 lbs) zucchini and yellow squash, sliced into ¼-inch rounds
- 2 ½ tbsp olive oil
- 1 ¼ tsp salt, divided
- ½ tsp ground black pepper
- ⅓ cup grated Parmesan cheese
- ⅓ cup gluten-free Panko breadcrumbs
- ¼ tsp garlic powder
- 2 tbsp chopped fresh parsley
How to Make Zucchini & Squash Casserole
- Prep the Oven and Dish: Preheat your oven to 350°F and lightly spray a 9-inch square baking dish.
- Salt and Rest: Slice your squash into thin rounds, sprinkle with ½ tsp salt, and let them rest for 10 minutes to release moisture. Pat dry with paper towels.
- Assemble: Neatly layer the slices in the dish, overlapping in rows. Drizzle with olive oil and sprinkle with the remaining salt and pepper.
- Top It Off: In a small bowl, mix Parmesan, breadcrumbs, and garlic powder. Sprinkle this delicious topping evenly over your squash.
- Bake Covered: Cover the dish with foil and bake for 30 minutes.
- Broil to Finish: Remove the foil and broil on high for 5–7 minutes, until the top is golden and crispy.
- Garnish and Serve: Sprinkle with chopped parsley and serve warm.
Tips for the Best Summer Squash Recipe
- Thin is in. Keep your slices uniform and thin for even cooking.
- Salt early. This step helps draw out moisture and keeps your casserole from getting watery.
- Breadcrumb magic. Gluten-free Panko adds that crave-worthy crunch without overpowering the dish.
- No parsley? Try basil or thyme for a different herbaceous note.
A Little Summer Story
I started making this casserole during a heatwave when I couldn’t bring myself to cook anything heavy, but still wanted that satisfying feeling of a baked dish. Our farmer’s market had squash practically spilling out of baskets, so I grabbed a bunch and got to layering. It became a hit instantly. Even my sceptical husband—who usually side-eyes anything green—went back for seconds. That’s when you know it’s a keeper.
Serving Suggestions
Serve this zucchini and squash casserole alongside grilled chicken, fish, or even a simple bowl of quinoa for a complete meal. It’s a star side dish for summer potlucks and elegant enough to bring to a dinner party. A chilled glass of white wine doesn’t hurt, either.
How to Store and Reheat
Got leftovers? Store them in an airtight container in the fridge for up to 3 days. To reheat, pop it in a 350°F oven for 10–15 minutes until warmed through and the topping is re-crisped. You can also microwave it in a pinch, but the oven does wonders for texture.
FAQs
Can I use only zucchini or only squash?
Absolutely. Just use what you have on hand.
Can I make it dairy-free?
Swap the Parmesan for a dairy-free cheese or nutritional yeast.
Can I prep this ahead?
Yes! You can assemble it up to a day in advance, cover, and refrigerate. When ready, just bake as directed.
Final Thoughts on Zucchini and Squash Casserole
This zucchini and squash casserole is the healthy vegetable bake your summer table needs. Simple, flavorful, and full of garden goodness, it’s one of those dishes that manages to be comforting and light all at once. Whether you’re cooking for your family or feeding a crowd, this easy casserole is sure to please.
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Zucchini & Squash Casserole: The Summer Bake That Steals the Show
- Total Time: 50 minutes
- Yield: 6 servings 1x
- Diet: Gluten Free
Description
This zucchini and squash casserole is a simple, wholesome bake that celebrates summer’s freshest produce. Thinly sliced squash layered and topped with a crispy, cheesy breadcrumb crust, it’s the perfect light yet satisfying side for any warm-weather meal—easy, gluten-free, and bursting with flavour.
Ingredients
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900 g (2 lbs) zucchini and yellow squash, sliced into ¼-inch rounds
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2 ½ tbsp olive oil
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1 ¼ tsp salt, divided
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½ tsp ground black pepper
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⅓ cup grated Parmesan cheese
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⅓ cup gluten-free Panko breadcrumbs
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¼ tsp garlic powder
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2 tbsp chopped fresh parsley
Instructions
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Preheat oven to 350°F. Lightly spray a 9-inch square baking dish.
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Slice squash into ¼-inch rounds. Sprinkle with ½ tsp salt and let rest 10 minutes. Pat dry.
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Layer the squash slices in the baking dish, overlapping them. Drizzle with olive oil, sprinkle with remaining salt and pepper.
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In a small bowl, mix Parmesan, breadcrumbs, and garlic powder. Sprinkle evenly over the squash.
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Cover with foil and bake for 30 minutes.
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Remove foil and broil for 5–7 minutes until golden and crisp.
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Garnish with chopped parsley and serve warm.
Notes
Uniform, thin slices ensure even cooking.
Salting the squash removes excess moisture to prevent sogginess.
Try basil or thyme instead of parsley for a flavor twist.
You can prepare the dish ahead and bake when ready.
Reheats best in the oven to maintain crispy topping.
- Prep Time: 15 minutes
- Cook Time: 35–37 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: American