Lunch

Savoury Zucchini Casserole

Name: Savoury Zucchini Casserole
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 4 medium zucchinis, sliced; 1 small onion, finely chopped; 2 cloves garlic, minced; 2 tbsp olive oil or butter; 1 cup shredded cheddar or mozzarella cheese; 1/2 cup grated Parmesan cheese; 1/2 cup sour cream or Greek yogurt; 2 large eggs, lightly beaten; 1/2 tsp dried oregano; 1/2 tsp dried thyme; 1/2 tsp salt; 1/4 tsp black pepper; 1/2 cup breadcrumbs; 1 tbsp melted butter (for topping)

ByMariem November 25, 2025November 25, 2025

Jump to Recipe

This savoury zucchini casserole is a tender, flavourful baked dish made with grated zucchini, eggs, cheese, and a crisp, golden topping. It is light yet satisfying, making it an ideal option for brunch, lunch, or a versatile side dish.

Why You’ll Love This Recipe

This recipe celebrates the mild sweetness of zucchini while balancing it with rich cheese, aromatic herbs, and buttery crumbs. The casserole bakes to a soft, custard-like texture with a delicately crisp top. Its simplicity, reliability, and elegant presentation make it suitable for family meals or entertaining. It reheats well, slices cleanly, and adapts easily to different flavour additions.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

zucchini
eggs
all-purpose flour
cheddar or mozzarella cheese
parmesan cheese
onion
garlic
olive oil or melted butter
salt
pepper
fresh thyme or parsley
breadcrumbs

Directions

Preheat the oven to 180°C (350°F). Line a baking dish with parchment paper or lightly grease it.
Grate the zucchini and squeeze out excess moisture using a towel.
In a bowl, whisk the eggs until smooth.
Add grated zucchini, chopped onion, minced garlic, flour, shredded cheese, salt, pepper, and herbs.
Stir until the mixture is evenly combined.
Transfer the mixture to the prepared baking dish and smooth the top.
Combine breadcrumbs with a small amount of melted butter or olive oil and sprinkle over the surface.
Top with thinly sliced zucchini for decoration if desired.
Bake for 35–45 minutes, or until set and golden brown on top.
Allow to cool slightly before slicing.

Servings and Timing

Serves 6–8 people.
Preparation time: 15 minutes
Cooking time: 35–45 minutes
Total time: approximately 1 hour

Variations

– Add grated carrot or corn for additional sweetness and colour.
– Stir in crumbled feta for a tangy flavour.
– Substitute fresh herbs with dried Italian seasoning.
– Incorporate cooked bacon or ham for a heartier casserole.
– Replace flour with almond flour for a lower-carbohydrate version.

Storage/Reheating

Store leftovers in an airtight container in the refrigerator for up to four days.
Reheat in the oven at 160°C (325°F) until warmed through, which keeps the top crisp.
The casserole may also be frozen for up to two months; thaw overnight and reheat in the oven.

FAQs

Why is my casserole watery?

Insufficiently drained zucchini often releases water during baking. Squeeze thoroughly before mixing.

Can I make this gluten-free?

Yes. Use a gluten-free flour blend or almond flour.

Can I use yellow squash instead of zucchini?

Yes. Yellow squash works similarly and provides the same texture.

Can I prepare the casserole mixture ahead of time?

Yes. Refrigerate the mixture for up to 12 hours before baking.

Why didn’t my casserole brown on top?

Add additional breadcrumbs or place under a broiler briefly for extra colour.

Can I add protein?

Cooked chicken, ham, or turkey integrate well into the mixture.

Can I omit the cheese?

Yes, though cheese adds structure and richness. Use nutritional yeast as a substitute if desired.

How do I prevent sogginess on the bottom?

Bake on the middle rack and ensure the oven is fully preheated.

Can I double the recipe?

Certainly. Use a larger baking dish and increase the baking time accordingly.

What should I serve with zucchini casserole?

It pairs well with roasted meats, salads, or crusty bread.

Conclusion

This savoury zucchini casserole is a comforting, versatile dish that showcases fresh zucchini in a flavourful, elegant presentation. Its soft interior, crisp topping, and adaptable nature make it suitable for any meal of the day. Whether served warm or reheated, it consistently delivers satisfying results with minimal effort.

Mariem