This delicious Zucchini Tomato Corn Casserole Bake is packed with fresh zucchini, juicy tomatoes, sweet corn, herbs, and melted cheese. It makes a wonderful summer side dish or a light vegetarian dinner for the whole family.
Prep time
15 minutes
Cook time
35–45 minutes
Servings
6
Ingredients
For the casserole
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2 medium zucchini, sliced into thin rounds
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2 medium tomatoes, sliced or chopped
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1 cup sweet corn kernels, fresh or thawed frozen
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1 small onion, finely chopped
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2 cloves garlic, minced
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1 cup shredded mozzarella cheese
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½ cup grated Parmesan cheese
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2 tablespoons olive oil
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½ teaspoon salt, or to taste
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½ teaspoon black pepper
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1 teaspoon Italian seasoning
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½ teaspoon paprika
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2 tablespoons chopped fresh parsley or basil
Optional creamy topping
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¼ cup breadcrumbs
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1 tablespoon melted butter
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¼ cup extra shredded cheese
Instructions
Step 1: Prepare the vegetables
Preheat your oven to 375°F (190°C). Wash the zucchini and tomatoes, then slice them evenly. Chop the onion and mince the garlic. If using frozen corn, thaw and drain it thoroughly.
Step 2: Season the vegetables
Place the zucchini, tomatoes, corn, and onion in a large bowl. Add the garlic, olive oil, salt, black pepper, paprika, and Italian seasoning. Toss gently until the vegetables are evenly coated.
Step 3: Assemble the casserole
Lightly grease a medium baking dish with olive oil. Spread the vegetable mixture evenly inside. Sprinkle the mozzarella and Parmesan cheese over the top.
For a crunchy topping, mix the breadcrumbs with melted butter and sprinkle over the cheese.
Step 4: Bake until golden
Bake uncovered for 35–45 minutes, until the zucchini is tender and the cheese is melted and lightly golden. If the top browns too quickly, loosely cover the dish with foil.
If your vegetables release excess liquid, carefully drain a little before serving.
Step 5: Rest and serve
Let the casserole rest for 5–10 minutes after baking. Sprinkle with fresh parsley or basil, then serve warm as a side dish or a light main course.
Tips for the best casserole
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Avoid excess moisture: Pat the zucchini dry after washing and avoid overly ripe, watery tomatoes.
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Add more flavor: A pinch of chili flakes or a little extra garlic gives the casserole a lovely kick.
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Try different cheeses: Cheddar, Monterey Jack, or a little crumbled feta also work well.
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Make it a complete meal: Add cooked chicken, white beans, or chickpeas for extra protein.
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Storage: Refrigerate leftovers in an airtight container for up to 3–4 days. Reheat in the oven or microwave until steaming hot.
Frequently asked questions
Q: Can I prepare this casserole ahead of time?
Yes. Assemble the vegetables and seasonings ahead, cover, and refrigerate. Add the cheese just before baking for the best texture.
Q: Can I use canned corn?
Yes. Drain it well before adding it to the casserole.
Q: Is this recipe vegetarian?
Yes, when made with vegetarian-friendly cheeses. Check the Parmesan label, as some varieties use animal-derived rennet.
Q: How do I know when it is ready?
The zucchini should be tender when pierced with a fork, and the cheese should be melted and lightly golden.
Q: What can I serve with it?
Serve with grilled chicken, baked fish, roasted potatoes, a green salad, or crusty bread.
Enjoy your cheesy, colorful Zucchini Tomato Corn Casserole Bake!