Baked Zucchini Tomato Casserole

Name: Baked Zucchini Tomato Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 6 servings
Ingredients: 4 medium zucchinis, sliced; 4 large tomatoes, sliced; 1 onion, chopped; 2 cups shredded mozzarella cheese; 1 cup grated Parmesan cheese; 3 cloves garlic, minced; 2 tablespoons olive oil; 1 teaspoon dried oregano; Salt and pepper to taste; Fresh basil for garnish

Highlighted under: Baking & Desserts

I love making Baked Zucchini Tomato Casserole because it combines freshness with comfort food, creating a delightful dish that brightens any meal. This recipe showcases the summer's best produce, layering zucchini, tomatoes, and cheese for a satisfying experience. Every bite bursts with flavor and color, making it perfect as a side or a light main course. With its simple preparation and wholesome ingredients, this dish has quickly become a favorite in my kitchen. I can't wait for you to try it!

Created by

Rowan Tate

Last updated on 2026-01-18T03:04:17.322Z

When I first made Baked Zucchini Tomato Casserole, I wanted to create a dish that was both seasonal and nutritious. The melding of zucchini with juicy tomatoes creates a beautifully colorful and vibrant presentation. I seasoned them simply, allowing the flavors of the vegetables to shine through, and topped it with a generous layer of cheese that melts perfectly to create a comforting bite.

One of the secrets to this casserole's success is pre-salting the zucchini to draw out excess moisture before baking. This step prevents the dish from becoming watery and ensures each bite is packed with flavor. Trust me, this method really makes a difference!

        Why You'll Love This Recipe
        A perfect blend of garden-fresh flavors
Easy to prepare and ready in no time
Comforting, cheesy goodness with every bite

      

Understanding the Ingredients

The combination of zucchini and tomatoes in this casserole not only brings vibrant colors to your dish but also balances flavors, adding a sweet and savory note. Zucchini, high in water content, helps to keep the casserole moist, while tomatoes add acidity, enhancing the overall taste. Opt for ripe, in-season tomatoes for the best flavor. If you have access to heirloom varieties, their rich taste and unique textures can elevate this dish even further.

Onions and garlic play crucial roles in building flavor in this casserole. Sautéing them until they are soft and fragrant releases their natural sweetness, which serves as a delicious base. Don't rush this step; allowing the onions to become translucent will deepen their flavor. If you're sensitive to onions, consider using shallots for a milder taste without sacrificing richness.

Technique Tips for Perfect Layers

When layering the ingredients in your baking dish, make sure to overlap the zucchini and tomatoes slightly. This not only creates visual appeal but also allows the juices from the tomatoes and zucchini to meld together during baking, resulting in a harmonious flavor profile. Avoid crowding the layers, as this can result in uneven cooking and sogginess in parts of the casserole.

Covering the dish with aluminum foil during the first baking phase helps to steam the vegetables, ensuring they cook through while preventing the cheese from browning prematurely. Remember to remove the foil for the last 10-15 minutes to achieve that golden, bubbly cheese topping that adds a rich texture and enhances the dish's comfort factor.

Ingredients

Gather these fresh ingredients to make your Baked Zucchini Tomato Casserole.

Ingredients

4 medium zucchinis, sliced
4 large tomatoes, sliced
1 onion, chopped
2 cups shredded mozzarella cheese
1 cup grated Parmesan cheese
3 cloves garlic, minced
2 tablespoons olive oil
1 teaspoon dried oregano
Salt and pepper to taste
Fresh basil for garnish

Once these ingredients are ready, we can start preparing the casserole!

Instructions

Follow these steps to create a delicious Baked Zucchini Tomato Casserole.

Prepare the Zucchini

Preheat your oven to 375°F (190°C). Slice the zucchini and layer them on a clean towel. Sprinkle salt over the slices and let them sit for about 10 minutes to draw out moisture.

Sauté the Onions and Garlic

In a skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic, sautéing until they are soft and fragrant, about 3-4 minutes.

Assemble the Casserole

In a greased baking dish, layer half of the zucchini slices, followed by half of the sautéed onions and garlic, and then half of the sliced tomatoes. Sprinkle with oregano and season with salt and pepper. Repeat the layers, finishing with a generous topping of mozzarella and Parmesan cheese.

Bake

Cover the dish with aluminum foil and bake in the preheated oven for 25 minutes. Remove the foil and bake for an additional 10-15 minutes until the cheese is bubbly and golden.

Serve

Remove from the oven and let cool for a few minutes. Garnish with fresh basil before slicing and serving.

Enjoy your delicious Baked Zucchini Tomato Casserole!

Pro Tips

For added flavor, consider incorporating fresh herbs like thyme or rosemary. You can also substitute different types of cheese to suit your taste preference.

Storage and Reheating

This Baked Zucchini Tomato Casserole can be prepared ahead of time and stored in the refrigerator for up to 3 days. To store, let the casserole cool completely before covering it with plastic wrap or transferring it to an airtight container. When you're ready to serve it, simply reheat in the oven at 350°F (175°C) for about 20-25 minutes, or until warmed through. This helps retain the texture and prevents the cheese from becoming chewy.

For longer storage, consider freezing the casserole. It's best to freeze it before baking. Assemble the layers in a freezer-safe dish, cover tightly, and it can last up to 2 months. When ready to eat, thaw it overnight in the refrigerator and bake at the original temperature, ensuring it’s heated through and the cheese is melted and bubbly.

Serving Suggestions

This casserole can stand alone as a light main dish, but it pairs beautifully with a simple green salad or crusty bread for a heartier meal. To add a protein element, consider serving it alongside grilled chicken or baked fish. The fresh flavors of the casserole complement the richness of the protein, creating a balanced plate.

For a twist, try adding different vegetables like bell peppers or mushrooms to the layers. These additions can introduce new textures and flavors to the dish, making it even more delightful. Just be mindful of the moisture content of any added vegetables, as too much liquid can make the casserole soggy. You may need to adjust baking times slightly if you add substantial ingredients.

Questions About Recipes

→ Can I make this casserole ahead of time?

Absolutely! You can assemble it a day in advance and store it in the refrigerator. Just bake it when you’re ready to serve.

→ Can I use other vegetables?

Yes! Feel free to add bell peppers, mushrooms, or eggplant for a different twist.

→ How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave.

→ Is this recipe gluten-free?

Yes, this casserole is gluten-free as long as you ensure your cheese and other ingredients do not contain gluten additives.