Savory Baked Zucchini and Squash Casserole
Looking for a healthy zucchini casserole recipe that’s creamy, cheesy, and full of flavor? This savory baked zucchini and squash casserole is the perfect comfort dish made with simple ingredients like fresh zucchini, yellow squash, cheese, and a creamy blend that bakes to golden perfection.
This easy Mediterranean casserole is ideal for busy weeknights, meal prep, or as a delicious side dish. It’s light yet satisfying, making it a great choice for anyone looking for a low-carb vegetable bake without sacrificing taste.
Ingredients for Zucchini and Squash Casserole
- 2 medium zucchini (sliced into rounds)
- 2 yellow squash (sliced)
- 1 small onion (thinly sliced)
- 2 garlic cloves (minced)
- 1 cup shredded mozzarella cheese
- ½ cup grated Parmesan cheese
- ½ cup sour cream (or Greek yogurt for a lighter, healthier option)
- 1 egg
- 2 tablespoons olive oil
- 1 teaspoon dried thyme (or Italian seasoning)
- ½ teaspoon paprika
- Salt and black pepper (to taste)
Optional Crispy Topping
- ¼ cup breadcrumbs
- 1 tablespoon melted butter
How to Make Baked Zucchini and Squash Casserole
Step 1: Preheat the Oven
Preheat your oven to 180°C (350°F) and lightly grease a baking dish to prevent sticking.
Step 2: Sauté the Vegetables
Heat olive oil in a large skillet over medium heat.
Add sliced onion and minced garlic, cooking until soft and fragrant.
Add zucchini and yellow squash, and sauté for about 5–6 minutes until slightly tender but not mushy.
Season with salt, black pepper, and thyme (or Italian seasoning).
This step enhances flavor and prevents excess moisture in your casserole.
Step 3: Prepare the Creamy Mixture
In a mixing bowl, combine:
- Sour cream (or Greek yogurt)
- Egg
- Half of the mozzarella cheese
- Half of the Parmesan cheese
Mix until smooth and creamy. This mixture creates a rich, cheesy base that binds the casserole together.
Step 4: Combine Everything
Add the sautéed vegetables to the creamy mixture and stir until evenly coated.
Transfer the mixture into your prepared baking dish and spread it evenly.
Step 5: Add the Cheese Topping
Sprinkle the remaining mozzarella and Parmesan cheese over the top.
For extra texture, mix breadcrumbs with melted butter and sprinkle evenly for a crispy golden crust.
Step 6: Bake to Perfection
Bake for 25–30 minutes, or until the casserole is bubbling and the top is golden brown.
Step 7: Cool and Serve
Let the casserole cool for a few minutes before serving. This helps it set and makes slicing easier.
Serve warm and enjoy this cheesy vegetable casserole
Health Benefits of This Zucchini Casserole
This healthy baked zucchini recipe is not only delicious but also packed with nutritional benefits:
- Low in carbs: Perfect for those following a low-carb or balanced diet
- Rich in vitamins: Zucchini and squash provide vitamin C, potassium, and antioxidants
- Good source of protein: Cheese and egg add satisfying protein
- Light yet filling: Ideal for weight management and clean eating
- Gut-friendly option: Greek yogurt adds probiotics when used as a substitute
Expert Tips for the Best Zucchini and Squash Casserole
- Avoid excess water: Zucchini releases moisture, so sautéing first is essential
- Slice evenly: Ensures uniform cooking and better texture
- Use Greek yogurt: For a lighter, high-protein alternative to sour cream
- Don’t overcook vegetables: Keep them slightly firm before baking
- Let it rest before serving: Helps the casserole hold its shape
- Add extra seasoning: Garlic powder or chili flakes can boost flavor
Easy Variations and Add-Ins
Customize your Mediterranean zucchini casserole with these ideas:
- Add cooked chicken or ground beef for extra protein
- Include vegetables like mushrooms, spinach, or bell peppers
- Swap mozzarella for cheddar or feta cheese for a stronger flavor
- Skip breadcrumbs for a keto-friendly version
- Add fresh herbs like parsley or basil for freshness
Serving Suggestions
This baked zucchini and squash casserole pairs perfectly with:
- Grilled chicken or fish
- Fresh salad
- Roasted potatoes or rice
- Crusty bread for a complete meal
Storage and Meal Prep Tips
- Refrigerate: Store in an airtight container for up to 3 days
- Freeze: Can be frozen for up to 2 months
- Reheat: Warm in the oven or microwave until heated through
Great for meal prep and make-ahead dinners.
Why You’ll Love This Recipe
- Quick and easy to prepare
- Made with simple, affordable ingredients
- Healthy and family-friendly
- Perfect for low-carb and vegetarian diets
- Creamy, cheesy, and full of flavor
