A beautiful Mediterranean-inspired roasted vegetable casserole made with layers of fresh zucchini, eggplant, tomatoes, and yellow squash, baked in a flavorful tomato-herb sauce. Finished with creamy crumbled feta, fresh rosemary, and a touch of olive oil, this dish is colorful, comforting, and full of delicious roasted flavors.
Prep Time: 20 minutes
Cook Time: 45–55 minutes
Total Time: 1 hour 15 minutes
Servings: 6
Course: Side Dish / Main Course
Cuisine: Mediterranean
Diet: Vegetarian, Gluten-Free
Ingredients
For the vegetables:
– 2 medium zucchini, thinly sliced
– 1 medium eggplant, thinly sliced
– 2 yellow squash, thinly sliced
– 3 medium tomatoes, thinly sliced
– 1 medium red onion, thinly sliced
– 3 tablespoons extra virgin olive oil
– 3 cloves garlic, minced
– 1 teaspoon dried oregano
– ½ teaspoon dried thyme
– ½ teaspoon smoked paprika
– Salt and black pepper, to taste
For the tomato sauce:
– 1 cup crushed tomatoes
– 2 tablespoons tomato paste
– 1 tablespoon olive oil
– 1 teaspoon Italian seasoning
– ½ teaspoon garlic powder
– ¼ teaspoon red pepper flakes (optional)
– Salt and black pepper, to taste
For the topping:
– ½ cup crumbled feta cheese
– 2 tablespoons dried cranberries (optional)
– 1–2 sprigs fresh rosemary
– 1 tablespoon fresh parsley, chopped
– 1 tablespoon extra virgin olive oil
Instructions
Step 1: Prepare the vegetables
Wash and dry all the vegetables thoroughly. Slice the zucchini, eggplant, yellow squash, tomatoes, and red onion into thin, even rounds.
Try to keep the slices approximately the same thickness so they cook evenly.
Step 2: Make the tomato sauce
Heat 1 tablespoon of olive oil in a small saucepan over medium heat. Add the minced garlic and cook for about 30 seconds until fragrant.
Add crushed tomatoes, tomato paste, Italian seasoning, garlic powder, red pepper flakes, salt, and black pepper.
Stir well and simmer for 5–7 minutes until slightly thickened.
Step 3: Prepare the baking dish
Preheat your oven to 375°F (190°C).
Lightly grease a round or oval baking dish with olive oil. Spread the prepared tomato sauce evenly across the bottom.
Step 4: Arrange the vegetables
Arrange the vegetable slices upright in overlapping rows or a circular pattern.
Alternate zucchini, eggplant, yellow squash, tomato, and red onion slices to create beautiful layers of color.
Continue arranging until the baking dish is completely filled.
Step 5: Season the vegetables
Drizzle olive oil over the arranged vegetables.
Sprinkle with dried oregano, thyme, smoked paprika, salt, and black pepper.
Make sure the seasoning is distributed evenly.
Step 6: Bake until tender
Cover the baking dish loosely with aluminum foil and bake for 30 minutes.
Remove the foil and continue baking for another 15–25 minutes, until the vegetables are tender, lightly caramelized, and golden around the edges.
Step 7: Add feta and rosemary
Remove the dish from the oven.
Sprinkle crumbled feta cheese over the vegetables. Add fresh rosemary, chopped parsley, and dried cranberries if desired.
Return to the oven for another 5 minutes, just until the feta is slightly warmed.
Step 8: Serve and enjoy
Allow the casserole to rest for 5–10 minutes before serving.
Garnish with fresh rosemary and a light drizzle of extra virgin olive oil.
Serve warm as a Mediterranean side dish or enjoy it as a light vegetarian main course.
Nutrition Information
Estimated values per serving, based on 6 servings.
Nutrient Amount
Calories 185 kcal
Protein 6 g
Total Fat 12 g
Saturated Fat 4 g
Carbohydrates 16 g
Dietary Fiber 4 g
Sugar 8 g
Sodium 390 mg
Cholesterol 17 mg
Nutrition values are approximate and may vary depending on vegetable sizes, feta brand, and amount of olive oil used.
Frequently Asked Questions (Q&A)
Q1: Can I prepare this vegetable casserole ahead of time?
Yes! You can slice the vegetables and prepare the tomato sauce up to 24 hours ahead. Store them separately in airtight containers in the refrigerator.
Q2: Can I make this recipe without feta cheese?
Absolutely! You can leave out the feta or replace it with dairy-free cheese for a vegan-friendly version.
Q3: What other vegetables can I add?
You can add thinly sliced potatoes, bell peppers, mushrooms, or sweet potatoes. Make sure the slices are thin enough to cook evenly.
Q4: Can I use fresh tomatoes instead of canned tomatoes?
Yes! Fresh ripe tomatoes work wonderfully. Blend or finely chop them before preparing the sauce.
Q5: How do I prevent the vegetables from becoming watery?
Avoid using overly ripe vegetables, slice them evenly, and don’t add too much sauce. You can lightly salt the eggplant and zucchini for 15 minutes, then pat them dry before assembling.
Q6: Is this recipe vegetarian?
Yes! The recipe is vegetarian. For a vegan version, simply omit the feta or use a plant-based alternative.
Q7: How should I store leftovers?
Allow the casserole to cool completely. Store in an airtight container in the refrigerator for up to 3–4 days.
Q8: Can I freeze this dish?
Yes, although the vegetables may become softer after thawing. Freeze in airtight containers for up to 2 months for best quality.
Q9: What can I serve with roasted vegetable tian?
It pairs beautifully with grilled chicken, baked salmon, roasted potatoes, quinoa, couscous, or warm Mediterranean flatbread.
Q10: How do I reheat leftovers?
Reheat in an oven at 350°F (175°C) for approximately 10–15 minutes, or until heated through.