Healthy Dinner Zucchini Tomato Casserole

Name: Healthy Dinner Zucchini Tomato Casserole
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Yield: 4 servings
Ingredients: 3 medium zucchinis, sliced; 4 ripe tomatoes, diced; 1 onion, chopped; 2 cloves garlic, minced; 1 teaspoon dried oregano; 1 teaspoon dried basil; Salt and pepper to taste; 1 cup shredded mozzarella cheese; 1/2 cup grated Parmesan cheese; 2 tablespoons olive oil

Highlighted under: Clean Inspiration

I love cooking up this Healthy Dinner Zucchini Tomato Casserole as it's a perfect blend of freshness and flavor. When I first tried this recipe, I was amazed at how simple ingredients like zucchini, tomatoes, and herbs can create a satisfying dish. It’s not only colorful but also packed with nutrients, making it a guilt-free choice for dinner. I find that baking it to perfection really enhances the natural sweetness of the vegetables, making each bite delightful. This dish has quickly become a staple in my household!

Created by

Sybil Hawkes

Last updated on 2026-01-11T19:26:37.021Z

When I first made this casserole, I was inspired by the abundance of fresh zucchini and tomatoes in my garden. I experimented with layering them along with herbs and spices. The result was a hearty meal that felt indulgent yet light. I particularly enjoy adding a sprinkle of parmesan on top in the last few minutes of baking—it adds a lovely crispy texture that elevates the dish.

Another delightful trick I've learned is to let it rest for about 10 minutes after taking it out of the oven. It helps the flavors to meld while making serving easier. This dish is not just visually appealing but also incredibly versatile; you can switch up the veggies based on what you have on hand.

Why You Will Love This Recipe
Packed with wholesome ingredients that nourish the body
Vibrant colors that make mealtime more enjoyable
Perfect for meal prepping and leftovers

Understanding the Ingredients

Each ingredient in this Healthy Dinner Zucchini Tomato Casserole plays a vital role in contributing to both flavor and texture. Zucchini, for instance, offers a mild flavor that absorbs the seasonings beautifully while providing moisture to the dish. Opt for medium-sized zucchinis that are firm and glossy; avoid any that feel soft or have blemishes. Tomatoes bring acidity and sweetness, enhancing the overall taste profile. Using ripe, vine-picked tomatoes will ensure you get the maximum flavor blend in your casserole.

Herbs like oregano and basil not only add a fragrant aroma but also bring an earthy depth that balances the fresh vegetables. Fresh herbs can be substituted for dried in equal amounts if desired; however, fresh basil should be added towards the end of cooking to preserve its vibrant flavor. When preparing the cheese, I recommend opting for part-skim mozzarella to keep the casserole lighter while still achieving that gooey texture; shredded cheese melts more evenly than block cheese, ensuring every bite is delightful.

Baking to Perfection

Baking the casserole with foil covers maintains moisture, allowing the vegetables to cook evenly and become tender. The first 30 minutes with foil ensures the zucchini cooks through, preventing them from becoming mushy. After you remove the foil, the cheese will turn golden brown and bubbly, creating a satisfying contrast to the tender veggies below. Keep an eye on the dish during the last 10 minutes; you want that golden top without overcooking it, which can lead to dry cheese.

If you prefer a more crispy texture, broil the casserole for an additional 1-3 minutes after baking. This will enhance the cheese's golden brown crust while ensuring the dish remains moist. Just remember to watch it closely while broiling to prevent burning, as it can go from perfectly crisp to charred very quickly.

Ingredients

Gather the following ingredients for a delicious casserole:

Ingredients

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

Once you have all the ingredients, we can start assembling the casserole!

Instructions

Follow these steps to create your casserole:

Preheat the oven

Preheat your oven to 375°F (190°C).

Sauté the onion and garlic

In a skillet, heat olive oil over medium heat. Add the chopped onion and minced garlic, and sauté until they are soft and fragrant, about 5 minutes.

Layer the vegetables

In a baking dish, layer the sliced zucchini and diced tomatoes. Sprinkle sautéed onion and garlic over the top, followed by oregano, basil, salt, and pepper.

Add cheese

Sprinkle mozzarella cheese and Parmesan cheese evenly over the layered vegetables.

Bake

Cover the dish with foil and bake for 30 minutes. Then, remove the foil and bake for an additional 10 minutes, or until the cheese is golden and bubbly.

Cool and serve

Allow the casserole to cool for about 10 minutes before serving. Enjoy your healthy dinner!

Now you have a delicious and healthy casserole ready to enjoy!

Pro Tips

For added flavor, consider using fresh herbs if available. Additionally, serving this casserole with a side of whole grain bread enhances the meal beautifully.

Meal Prep and Storage

This casserole is excellent for meal prepping. You can assemble it in advance and store it covered in the refrigerator for up to two days before baking. If you want to make it even easier, consider layering the vegetables and cheese in a freezer-safe dish. It will stay fresh for up to three months in the freezer. Simply thaw the casserole in the refrigerator overnight before baking to reheat it effectively without compromising flavor or texture.

Leftovers can be stored in an airtight container in the refrigerator for about 3-4 days. To reheat, place the casserole in the oven at 350°F (175°C) for about 20 minutes, or until heated through. You can also microwave individual portions on medium power for 2-3 minutes; just cover them to retain moisture.

Variations and Add-Ins

Feel free to get creative with this casserole by adding other vegetables or protein. Spinach, bell peppers, or even thinly sliced eggplant can complement the existing flavors beautifully. For a protein boost, consider adding shredded rotisserie chicken or cooked quinoa. Simply layer them along with the zucchini and tomatoes to create a more filling meal without compromising the essence of the dish.

You can also experiment with different types of cheese. A sharp cheddar or a sprinkle of feta can add a unique twist to the flavor profile. If you are looking for a dairy-free option, use cashew cream or a vegan cheese substitute, ensuring that they are evenly distributed to maintain creaminess throughout the casserole.

Questions About Recipes

→ Can I use other vegetables?

Absolutely! Feel free to use spinach, bell peppers, or even eggplant based on your taste and seasonality.

→ Can I make this casserole ahead of time?

Yes! You can prep it a day in advance and store it in the fridge. Just add a few minutes to the baking time if cooking directly from the fridge.

→ Is it freezer-friendly?

Yes, you can freeze this casserole. Just make sure to wrap it tightly before freezing to maintain quality.

→ How can I make it vegetarian?

This recipe is already vegetarian! Just ensure that the cheeses you use are suitable for your dietary preferences.