The Summer Vegetable Gratin is a delightful dish that showcases the vibrant colors and flavors of seasonal produce. This recipe is not only easy to prepare but also versatile enough to complement any meal, whether it’s a casual family dinner or a festive gathering. With its rich tomato-herb broth and cheesy topping, this gratin brings comfort and satisfaction to your table while being suitable for those following a low FODMAP diet.

Why You’ll Love This Recipe
- Easy to Prepare: This gratin comes together quickly, making it perfect for busy weeknights.
- Flavorful and Fresh: Bursting with summer vegetables, each bite offers a taste of the season.
- Versatile Side Dish: Pair it with grilled meats, serve it at picnics, or enjoy it as a light main course.
- Low FODMAP Friendly: Enjoy a delicious meal without worrying about digestive discomfort.
- Colorful Presentation: The layers of vegetables create an eye-catching dish that impresses guests.
Tools and Preparation
Preparing the Summer Vegetable Gratin requires just a few essential tools to make the process smooth and enjoyable.
Essential Tools and Equipment
- Medium skillet
- 8 x 8-inch | 20 x 20 cm baking dish
- Small bowl
- Aluminum foil
Importance of Each Tool
- Medium skillet: Ideal for sautéing leeks until tender, enhancing their flavor.
- Baking dish: Provides the perfect size for layering vegetables while allowing even cooking.
- Small bowl: Useful for mixing the tomato-herb broth thoroughly before adding it to your gratin.
Ingredients
A delicious Low FODMAP Summer Vegetable Gratin recipe. The perfect side dish with colourful summer vegetables topped with grated cheese.
Vegetables
- 13.7 oz | 390g zucchini (1 medium, or 1/2 green zucchini and 1/2 yellow zucchini)
- 5.29 oz | 150g eggplant (1 small)
- 8.4 oz | 238g common tomatoes (2 medium)
- 1.9 oz | 50g leek leaves (thinly sliced)
- 2 tbsp olive oil (plus more to drizzle)
- Salt and black pepper to taste
Tomato-Herb Broth
- 2 tbsp | 28g tomato paste (low FODMAP, no onions or garlic added)
- 1/2 cup | 75ml water
- 1 tsp dried oregano
- 1 tsp dried thyme (optional)
- 1 tsp salt
Topping
- 1/2 cup | 80g grated mozzarella cheese
- 1 tbsp fresh basil leaves (thinly chopped)

How to Make Summer Vegetable Gratin
Step 1: Preheat the Oven
Preheat your oven to 400° F | 200ºC. This ensures that your gratin cooks evenly.
Step 2: Sauté the Leeks
Heat olive oil in a medium skillet over medium heat.
1. Add the leek leaves and cook for about 3 to 5 minutes until they are tender.
2. Transfer the cooked leeks to an 8 x 8-inch baking dish, covering the bottom evenly.
Step 3: Prepare the Broth
In a small bowl:
1. Stir together the water, tomato paste, dried herbs, and salt until well combined.
2. Set aside while you prepare the vegetables.
Step 4: Layer the Vegetables
Wash all vegetables thoroughly and cut them into rounds about 1/4-inch thick.
1. Arrange them in alternating rows on top of the leeks in the baking dish.
2. Ensure that the layers fit snugly but are not crammed together.
Step 5: Add Broth and Bake
Strain the prepared broth over the layered vegetables.
1. Season with salt and pepper to taste.
2. Drizzle with olive oil before covering with aluminum foil.
3. Bake in the preheated oven until vegetables are tender, approximately 40 minutes.
Step 6: Top with Cheese & Final Bake
Remove the foil from your baking dish.
1. Sprinkle grated mozzarella cheese evenly across the top.
2. Return to oven uncovered and bake until cheese is melted and golden brown, about 15 minutes.
3. Let cool for at least 10 minutes before garnishing with fresh basil leaves and serving.
Enjoy your delicious Summer Vegetable Gratin, a wholesome side dish that highlights seasonal produce!
How to Serve Summer Vegetable Gratin
Serving Summer Vegetable Gratin can enhance your dining experience, making it a delightful centerpiece or a complementary side dish. Here are some creative serving suggestions that will elevate your meal.
As a Standalone Dish
- This gratin can be enjoyed on its own as a light lunch or dinner. Pair with a simple salad for a satisfying meal.
With Grilled Proteins
- Serve alongside grilled chicken, fish, or tofu. The fresh flavors of the vegetables complement the smoky taste of grilled items beautifully.
Over Quinoa or Rice
- Spoon the gratin over cooked quinoa or rice for added texture and nutrition. This combination makes for a wholesome and filling meal.
Topped with Fresh Herbs
- Garnish with extra fresh basil or parsley just before serving. This adds a burst of freshness and color to the dish.
With Crusty Bread
- Offer slices of crusty bread on the side. Guests can scoop up the gratin with bread, enhancing the experience.
Accompanied by a Light Salad
- A crisp green salad pairs well with this dish, balancing the richness of the cheese and vegetables. Dress lightly with olive oil and vinegar.
How to Perfect Summer Vegetable Gratin
To ensure your Summer Vegetable Gratin turns out perfectly every time, consider these helpful tips.
- Choose Fresh Vegetables: Select seasonal vegetables for the best flavor and texture. Fresh ingredients will enhance the overall taste of your gratin.
- Slice Evenly: Cut vegetables into uniform sizes to ensure even cooking. This helps all components cook at the same rate, resulting in tender bites.
- Don’t Skip Seasoning: Generously season each layer with salt and pepper. Proper seasoning brings out the natural flavors of the vegetables.
- Use Quality Cheese: Opt for high-quality mozzarella for topping. A good cheese melts beautifully and adds rich flavor to your gratin.
- Let it Rest: Allow the gratin to sit after baking for at least 10 minutes before serving. This resting time helps it set up nicely for easier serving.
- Experiment with Herbs: Feel free to mix different herbs based on your preference. Fresh thyme or rosemary can add unique flavors to your dish.

Best Side Dishes for Summer Vegetable Gratin
Pairing side dishes with Summer Vegetable Gratin can enhance your meal’s overall appeal. Here are some fantastic options that complement this delicious recipe perfectly.
- Garlic Bread: A classic choice, garlic bread provides a crunchy texture that pairs well with the soft gratin.
- Simple Green Salad: A fresh salad with mixed greens offers a refreshing contrast to the cheesy gratin.
- Roasted Potatoes: Crispy roasted potatoes serve as a hearty side that works well alongside any vegetable dish.
- Couscous Salad: Light and fluffy couscous mixed with vegetables and herbs adds an interesting texture element.
- Steamed Asparagus: Bright green asparagus adds color and is an elegant side that complements many dishes.
- Grilled Corn on the Cob: Sweet corn enhances summer themes while adding natural sweetness.
- Balsamic Glazed Brussels Sprouts: These sprouts provide a savory element that balances the richness of the gratin.
- Herbed Rice Pilaf: Fluffy rice pilaf infused with herbs can soak up any juices from the gratin, creating a delightful bite every time.
Common Mistakes to Avoid
Cooking can be tricky, and making a Summer Vegetable Gratin is no exception. Here are some common mistakes and tips on how to avoid them.
- Ignoring Vegetable Sizes: Cutting vegetables into uneven sizes can lead to uneven cooking. Ensure all veggies are sliced uniformly for consistent tenderness.
- Overcrowding the Dish: Stuffing too many vegetables in the baking dish can prevent proper cooking. Arrange them snugly but allow space for even heat distribution.
- Skipping Seasoning: Not seasoning your vegetables properly can result in bland flavors. Always season with salt and pepper before baking to enhance taste.
- Not Preheating the Oven: Starting with an unheated oven can affect cooking times and outcomes. Always preheat to 400° F | 200ºC before placing your dish inside.
- Removing Foil Too Early: Taking off the foil too soon may prevent the cheese from melting properly. Wait until the vegetables are tender before uncovering to add cheese.
Storage & Reheating Instructions
Refrigerator Storage
- Store leftover Summer Vegetable Gratin in an airtight container.
- It will last for up to 3-4 days in the refrigerator.
Freezing Summer Vegetable Gratin
- Freeze portions in freezer-safe containers or bags.
- This dish can be frozen for up to 2 months for optimal quality.
Reheating Summer Vegetable Gratin
- Oven: Preheat your oven to 350° F | 175° C and cover with foil. Heat for about 20 minutes or until warmed through.
- Microwave: Place a slice on a microwave-safe plate and cover loosely. Heat on high for 1-2 minutes, checking every 30 seconds.
- Stovetop: Heat in a skillet over medium-low heat, stirring occasionally until warmed throughout.

Frequently Asked Questions
What is Summer Vegetable Gratin?
Summer Vegetable Gratin is a baked dish featuring layers of colorful summer vegetables topped with cheese, creating a delicious side or light meal option.
Can I customize my Summer Vegetable Gratin?
Absolutely! Feel free to swap out vegetables based on your preference or what you have on hand, such as bell peppers or squash.
How do I ensure my gratin has enough flavor?
Season your vegetables well with salt and pepper before baking, and consider adding herbs like thyme or fresh basil for added flavor.
Is this recipe suitable for meal prep?
Yes! The Summer Vegetable Gratin stores well in the refrigerator and can be frozen, making it perfect for meal prepping.
Can I make this dish dairy-free?
You can substitute mozzarella cheese with a dairy-free alternative or nutritional yeast for a similar cheesy flavor without the dairy.
Final Thoughts
The Summer Vegetable Gratin is not only vibrant but also versatile, making it a delightful addition to any meal. You can easily customize it by swapping in your favorite seasonal veggies. Give this recipe a try, and enjoy a healthy, colorful side that everyone will love!

Summer Vegetable Gratin
- Total Time: 1 hour 10 minutes
- Yield: Serves 4
Description
Indulge in the vibrant flavors of summer with this delightful Summer Vegetable Gratin. Bursting with colorful seasonal vegetables, this dish features a rich tomato-herb broth and is topped with melty mozzarella cheese, offering a comforting and satisfying meal option. Perfect for busy weeknights or festive gatherings, this gratin is not only easy to prepare but also low FODMAP-friendly, making it suitable for a variety of dietary needs. Serve it as a standalone dish, alongside grilled proteins, or over grains for a nutritious meal that everyone will love.
Ingredients
- Zucchini (390g)
- Eggplant (150g)
- Common tomatoes (238g)
- Leek leaves (50g)
- Olive oil (2 tbsp)
- Low FODMAP tomato paste (28g)
- Mozzarella cheese (80g)
Instructions
- Preheat your oven to 400°F (200°C).
- Sauté the leeks in olive oil until tender, then spread them in a baking dish.
- Mix water with tomato paste and herbs; layer sliced vegetables on top of leeks.
- Pour the broth mixture over the veggies and bake covered for 40 minutes.
- Uncover, sprinkle with mozzarella, and bake until golden brown, about 15 minutes.
- Let cool for 10 minutes before serving.
- Prep Time: 15 minutes
- Cook Time: 55 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cup (150g)
- Calories: 210
- Sugar: 4g
- Sodium: 320mg
- Fat: 9g
- Saturated Fat: 4g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 29g
- Fiber: 7g
- Protein: 8g
- Cholesterol: 20mg
Keywords: Feel free to swap in other seasonal vegetables like bell peppers or squash for added variety. For a dairy-free version, use a plant-based cheese alternative.
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