Quick Cheesy Zucchini Tomato Bake

This zucchini tomato bake turns a pile of summer vegetables into a bubbly, golden casserole with about 15 minutes of hands-on work. It’s a forgiving dish that comes out of the oven looking like you fussed, with melted cheese and crisp panko all over the top.

Juicy tomato slices and tender zucchini overlap in every bite, and the edges get those irresistible crispy bits. I make it as a side for grilled chicken or sausage, but it’s hearty enough to stand alone with a salad and crusty bread.

Why This Bake Works

The slices are thin so they cook through evenly, and the garlic-tossed zucchini releases moisture that mingles with the tomato juices to form a light, savory broth underneath. Nothing dries out.

That Parmesan-panko topping sits on top of the cheese layer and browns into a salty, crunchy crust while the mozzarella melts down into every gap. It’s a simple assembly that looks much harder than it is.

It also holds its shape when you scoop it out, so it plates cleanly. For a meatless Monday or a last-minute potluck side, this is the one I reach for when the garden is overflowing.

Ingredients

• 3 medium zucchini (about 1.5 lbs): firm and heavy for their size
• 3 medium ripe tomatoes: firm enough to hold their shape when baked
• 2 tbsp olive oil, plus more for the dish: use a good everyday oil
• 2 cloves garlic: minced
• ½ tsp kosher salt
• ¼ tsp black pepper
• 1 cup shredded mozzarella cheese: whole-milk melts best
• ¼ cup grated Parmesan cheese
• ⅓ cup panko breadcrumbs: plain, not seasoned
• 2 tbsp chopped fresh basil: for serving

Variations / Substitutions

• Swap the protein: Stir ½ cup of cooked, crumbled Italian sausage into the layers before baking for a heartier dish.
• Change the herbs: Fresh oregano or thyme works in place of basil, or add a pinch of dried Italian seasoning to the breadcrumb mix.
• Use a different cheese: Provolone or fontina can stand in for mozzarella. A little crumbled feta sprinkled over the top adds a salty tang.
• Add heat: A pinch of red pepper flakes to the garlic oil or a few thin slices of fresh jalapeño tucked between the layers gives it a gentle kick.
• Make it dairy-free: Use your favorite plant-based shredded mozzarella and a dairy-free Parmesan alternative. The panko still crisps up beautifully.

For another summer bake, try our Easy Ratatouille Casserole.

How to Make Zucchini Tomato Bake

Step 1: Slice and Season the Vegetables

Preheat your oven to 400°F (200°C) and lightly grease an 8-inch square baking dish with olive oil. Slice the 3 medium zucchini and the 3 medium tomatoes into ¼-inch rounds. Toss the zucchini slices with 1 tablespoon of olive oil, the minced garlic, ½ teaspoon salt, and ¼ teaspoon pepper in a bowl.

The zucchini will soften and release moisture while it bakes, which blends with the tomato juices to create a light, juicy base. That moisture is what prevents the dish from drying out, so don’t drain it.

Step 2: Layer the Zucchini and Tomatoes

Arrange the seasoned zucchini slices in the prepared dish, overlapping them just a little. Tuck the tomato rounds between and on top of the zucchini, shingling them in a single layer. Drizzle the remaining 1 tablespoon of olive oil evenly over the vegetables.

As they bake, the layers will collapse slightly and meld together. The pattern doesn’t need to be precise; a rustic, shingled look turns into a pretty mosaic once everything softens and bubbles.

Step 3: Top with the Cheesy Crumb

Stir together the 1 cup mozzarella, ¼ cup Parmesan, and ⅓ cup panko in a small bowl. Sprinkle this mixture over the layered vegetables, covering the surface completely. Press down gently with your palm so the crumb adheres.

The panko will crisp and brown while the cheeses melt and seep down between the slices. This double layer of topping is what gives you both a gooey interior and a crunchy golden crust.

Step 4: Bake the Casserole

Slide the dish into the preheated oven and bake for 25 minutes. The edges should be bubbling and the topping deeply golden. If the top hasn’t crisped to your liking after 25 minutes, you can switch the oven to broil for the last 2 minutes.

Keep a close eye during any broiling, because panko can go from golden to burnt quickly. The aroma in your kitchen at this stage will be all garlic, sweet tomato, and toasted cheese.

Step 5: Broil and Serve

If you’re broiling to finish, run it for 2 minutes until the top is dark golden in spots. Remove the dish from the oven, scatter the 2 tablespoons of chopped fresh basil over the top, and let it rest for 5 minutes before serving.

The short rest helps the juices settle so the bake slices neatly and the layers hold together when you scoop them out. Serve it warm while the cheese is still stretchy and the edges are crisp.

A Few Tips Before You Bake

• If your zucchini are especially watery or you’re using large garden-grown ones, salt the sliced rounds lightly and let them drain on paper towels for 10 minutes before tossing with the oil. Pat dry, then proceed. This gives you a firmer final texture.
• A mandoline makes uniform ¼-inch slices in seconds, but a sharp chef’s knife and a little patience work just as well.
• For a crunch that leans even more savory, swap the panko for crushed buttery crackers or seasoned breadcrumbs.
• You can assemble the casserole (without the crumb topping) up to a few hours ahead and refrigerate it. Bring it to room temperature, add the topping, then bake as directed.

Bake times shift a little with the dish you use. Here’s a quick reference so you can adapt it to what’s in your cupboard.

Storing Leftover Zucchini Tomato Bake

• Refrigerate: Cover the dish tightly and store in the fridge for up to 3 days. The tomatoes will release a little more liquid, but the flavor holds well.
• Reheating: Warm individual servings in a 350°F oven until heated through, about 10 minutes, which re-crisps the topping nicely. A microwave works in a pinch, but the topping will soften.

What Goes Well With Zucchini Tomato Bake

Grilled Italian sausages or a simple roast chicken soak up the juices beautifully. It’s also right at home next to a thick slice of crusty bread salted with butter and a crisp green salad dressed in a sharp vinaigrette, together they make a satisfying meatless meal.

Frequently Asked Questions

Can I use yellow squash instead of zucchini?

Yes, yellow squash works just as well. The flavor is slightly sweeter and the color makes a pretty contrast with the tomatoes.

Can I make this dairy-free?

You can. Swap the mozzarella and Parmesan with your favorite plant-based shredded cheese, and the panko will still crisp up without any dairy.

Can I freeze this bake?

It is best fresh, but you can freeze it after baking. Thaw overnight in the fridge and reheat in a 350°F oven until hot, though the zucchini will be a bit softer.

Do I have to peel the zucchini?

No, the thin skin softens during baking and adds a nice pop of color. Peel only if your zucchini is very large, tough, or overly seedy.

Zucchini Tomato Bake Recipe

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Prep Time 15 minutes mins

Cook Time 27 minutes mins

Total Time 42 minutes mins

Servings: 4 servings

Calories: 217

Ingredients Method Notes

Ingredients

  

• 3 medium zucchini (about 1.5 lbs)
• 3 medium ripe tomatoes
• 2 tbsp olive oil, plus more for the dish
• 2 cloves garlic, minced
• ½ tsp kosher salt
• ¼ tsp black pepper
• 1 cup shredded mozzarella cheese
• ¼ cup grated Parmesan cheese
• ⅓ cup panko breadcrumbs
• 2 tbsp chopped fresh basil

Method

 

1. Preheat oven to 400°F (200°C) and lightly grease an 8-inch square baking dish. Slice zucchini and tomatoes into ¼-inch rounds. Toss zucchini with 1 tbsp olive oil, garlic, salt, and pepper.
2. Arrange seasoned zucchini in the dish, tuck tomato slices among them, and drizzle the remaining 1 tbsp olive oil on top.
3. Combine mozzarella, Parmesan, and panko, then sprinkle over the vegetables, pressing gently.
4. Bake for 25 minutes until edges bubble and topping is golden. If desired, broil the final 2 minutes for extra crispness.
5. Remove from oven, scatter fresh basil over the top, and let rest 5 minutes before serving.

Notes

If your zucchini are very watery, salt the rounds and let them drain on paper towels for 10 minutes before tossing with the oil; pat dry and skip the salt in the oil mixture. The rest time is important, it lets the juices settle so the bake holds together on the plate.