Zucchini Tomato Gratin
There’s something wonderfully comforting about a Zucchini Tomato Gratin. This dish not only highlights the fresh, vibrant flavors of summer produce but also transforms them into a creamy, cheesy delight that everyone loves. I first tried this gratin at a friend’s gathering, where it quickly became the star of the table. Since then, it has found a special place in my kitchen—perfect for family dinners, casual get-togethers, or even as a side dish during special occasions.
Table of Contents
Table of Contents
Why You’ll Love This Recipe
One of the most compelling reasons to try your hand at this Zucchini Tomato Gratin is its elegant simplicity. This dish is not only a feast for the eyes but also a delicious way to consume vegetables. It’s relatively quick to prepare, making it an ideal choice for weeknight dinners or brunches. The crispy topping adds a delightful texture that balances the creaminess beneath it.
“This gratin was the highlight of our family dinner. Everyone went back for seconds!”
From its comforting flavor to its eye-catching presentation, it ticks all the boxes for a crowd-pleaser.
How to Make Zucchini Tomato Gratin
Creating this gratin is a straightforward process, and I assure you that the rewards far exceed the effort. Here’s a brief overview: you’ll start by preparing the vegetables to avoid excess moisture. Next, you’ll build an aromatic base, layer the ingredients, and finish with a crispy cheese topping. Let’s dive into the details.
Ingredients
To prepare this delightful gratin, gather the following ingredients:
- Zucchini: 2 lbs (about 4 medium). Look for firm zucchini with smooth, unblemished skin. This is the star vegetable, providing a tender, slightly sweet base.
- Tomatoes: 1.5 lbs (about 4-5 medium Roma or on-the-vine tomatoes). Ripe, flavorful tomatoes are crucial as they release their sweet juices and create a natural sauce.
- Kosher Salt: 1.5 teaspoons, divided. Used to draw excess water from the zucchini and to season the entire dish.
- Olive Oil: 3 tablespoons, extra virgin. A quality olive oil adds a fruity, peppery depth of flavor for sautéing and drizzling.
- Yellow Onion: 1 large, finely chopped. This builds the foundational aromatic layer of the gratin, adding a sweet and savory depth.
- Garlic: 4 cloves, minced. Fresh garlic is non-negotiable for that pungent, aromatic kick that permeates the entire dish.
- Dried Oregano: 1 teaspoon. Adds a classic, earthy Mediterranean flavor that pairs perfectly with tomato and zucchini.
- Fresh Thyme: 1 tablespoon, leaves stripped from stems. Provides a subtle, woodsy, and floral note that elevates the gratin.
- Black Pepper: ½ teaspoon, freshly ground. For a touch of spice and to enhance the other flavors.
- Gruyère Cheese: 1.5 cups, freshly grated. A nutty, slightly sweet, and salty cheese that melts beautifully, creating a creamy texture within the layers.
- Parmesan Cheese: ½ cup, freshly grated. Adds a sharp, salty, and umami-rich flavor, especially to the topping.
- Panko Breadcrumbs: ¾ cup. These Japanese-style breadcrumbs are lighter and flakier than traditional breadcrumbs, guaranteeing a superiorly crispy and golden topping.
Directions
Step 1: Prepare the Vegetables (The Anti-Soggy Step)
Begin by preparing your primary vegetables to ensure your final gratin is tender and creamy, not watery. Slice the zucchini and tomatoes into uniform ¼-inch thick rounds. Consistency in thickness is key for even cooking. Place the zucchini slices in a colander set over a bowl or in the sink. Sprinkle them generously with 1 teaspoon of the kosher salt, tossing gently to coat. Let the zucchini sit for at least 30 minutes, or up to an hour. You will see beads of moisture form on the surface and drip into the bowl. This crucial step, known as disgorging, draws out a significant amount of excess water from the zucchini, which is the number one secret to preventing a soupy gratin. After 30-60 minutes, rinse the zucchini slices under cold water to remove the excess salt, then pat them thoroughly dry with a clean kitchen towel or paper towels. Be meticulous here; the drier the slices, the better the final texture.
Step 2: Sauté the Aromatic Base
While the zucchini is resting, create the flavor foundation for your gratin. Heat 2 tablespoons of the olive oil in a large skillet over medium heat. Once the oil shimmers, add the finely chopped yellow onion. Sauté the onion, stirring occasionally, for about 5-7 minutes, until it becomes soft and slightly sweet. Add the minced garlic, dried oregano, and fresh thyme leaves to the skillet. Continue to cook for another 1-2 minutes, stirring constantly until the garlic is fragrant. Be careful not to let the garlic burn, as it will become bitter. This step blooms the flavors, infusing the entire dish with their aroma.
Step 3: Preheat and Prepare the Baking Dish
Position a rack in the center of your oven and preheat it to 400°F (200°C). Take a 9×13 inch baking dish (or a similar 2.5 to 3-quart casserole dish) and rub the inside with the remaining 1 tablespoon of olive oil or a bit of butter to prevent sticking and add another subtle layer of flavor.
Step 4: Combine the Cheeses and Topping
In a medium-sized bowl, prepare your cheese and breadcrumb topping. Combine the ¾ cup of Panko breadcrumbs, the ½ cup of grated Parmesan cheese, and a pinch of black pepper. Drizzle with the remaining 1 tablespoon of olive oil and toss everything together until the breadcrumbs are evenly coated. In a separate bowl, toss the 1.5 cups of grated Gruyère cheese with the remaining ½ teaspoon of kosher salt and ½ teaspoon of black pepper.
Step 5: Assemble the Gratin Layers
Now for the fun part! Spread the cooked onion and garlic mixture evenly across the bottom of your prepared baking dish, creating a savory bed for the vegetables. Begin arranging the vegetable slices on top of the onions, starting at one end and creating overlapping rows, alternating between a slice of zucchini and a slice of tomato. This arrangement not only looks stunning but also helps with even cooking. Continue layering until the entire dish is filled. Don’t worry about perfection; a rustic look is part of the charm.
Step 6: Add the Cheese and Bake
Sprinkle the seasoned Gruyère cheese evenly over the top of the arranged zucchini and tomatoes, tucking it between the slices where you can. This will create a rich, creamy sauce. Finally, sprinkle the Panko breadcrumb and Parmesan mixture evenly over the entire surface.
Step 7: Bake to Golden Perfection
Place the baking dish on a baking sheet to catch any potential drips. Bake in the preheated 400°F (200°C) oven for 30 to 40 minutes. The gratin is done when the vegetables are tender (a knife should easily pierce a zucchini slice), the cheese is fully melted, and the breadcrumb topping is a deep golden brown and crispy. If the topping is browning too quickly before the vegetables are cooked, loosely tent a piece of aluminum foil over the top for the last 10-15 minutes of baking.
How to Serve Zucchini Tomato Gratin
This gratin shines best when served warm, right out of the oven. Consider garnishing it with fresh herbs like basil or parsley for an added touch of color and flavor. Pair it with a crisp green salad or serve alongside grilled meats for a well-rounded meal. Its versatility makes it an excellent side dish for any protein or a hearty main for a vegetarian feast.
How to Store
To keep leftover gratin fresh, store it in an airtight container in the refrigerator immediately after cooling to room temperature. It should stay good for about 3-5 days. Reheat individual portions in the microwave or in the oven at 350°F (175°C) until warmed through. For longer storage, you can freeze the gratin before baking it. Simply cover it tightly in foil or plastic wrap and freeze up to 2 months. When ready to enjoy, bake from frozen, allowing extra cooking time to ensure it’s heated all the way through.
Tips to Make
Here are some practical tips to elevate your gratin-making experience:
- Opt for fresh, seasonal vegetables whenever possible; they enhance flavor and nutrition.
- If you’re looking to lighten the dish, consider using low-fat cheeses or a combination of cheese and breadcrumbs to achieve the same texture.
- For added flavor complexity, incorporate other vegetables like bell peppers or eggplant into your layering.
Variations
Feel free to customize your Zucchini Tomato Gratin! Here are some ideas to get you started:
- Swap out Gruyère for other melty cheeses like mozzarella or Fontina.
- Add layers of roasted red peppers or sautéed mushrooms for more depth.
- Spice things up with a sprinkle of red pepper flakes or a dash of smoked paprika in the cheese mixture.
Conclusion
This Zucchini Tomato Gratin is a fantastic way to enjoy the bounty of summer vegetables while pleasing the whole family. Easy to make and utterly delicious, it’s sure to become a beloved dish in your home. Give it a try, and don’t forget to share your thoughts and tweaks in the comments!
FAQs
How long does it take to prepare this gratin?
Preparation, including the disgorging step, will take about 1 hour. Baking takes an additional 30-40 minutes.
Can I make this gratin in advance?
Absolutely! You can prepare it, store it in the fridge, and then bake it when you’re ready to serve.
What can I use instead of Gruyère cheese?
Feel free to substitute with cheeses like mozzarella or Monterrey Jack if Gruyère isn’t available.
Is this dish gluten-free?
The standard recipe is not gluten-free due to the Panko breadcrumbs. You can easily substitute with gluten-free breadcrumbs.
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Zucchini Tomato Gratin
- Total Time: 90 minutes
- Yield: 4 servings
- Diet: Vegetarian
Description
A comforting Zucchini Tomato Gratin highlighting fresh summer produce in a creamy, cheesy delight.
Ingredients
- Zucchini: 2 lbs (about 4 medium)
- Tomatoes: 1.5 lbs (about 4-5 medium Roma or on-the-vine tomatoes)
- Kosher Salt: 1.5 teaspoons, divided
- Olive Oil: 3 tablespoons, extra virgin
- Yellow Onion: 1 large, finely chopped
- Garlic: 4 cloves, minced
- Dried Oregano: 1 teaspoon
- Fresh Thyme: 1 tablespoon, leaves stripped from stems
- Black Pepper: ½ teaspoon, freshly ground
- Gruyère Cheese: 1.5 cups, freshly grated
- Parmesan Cheese: ½ cup, freshly grated
- Panko Breadcrumbs: ¾ cup
Instructions
- Prepare the Vegetables: Slice zucchini and tomatoes into ¼-inch thick rounds. Sprinkle zucchini with salt and let sit for at least 30 minutes.
- Sauté the Aromatic Base: Cook onion in olive oil until soft, then add garlic, oregano, and thyme.
- Preheat and Prepare: Preheat oven to 400°F (200°C) and prepare the baking dish with olive oil.
- Combine the Cheeses and Topping: Mix Panko, Parmesan, and black pepper with olive oil in a bowl.
- Assemble the Gratin Layers: Layer the onion mixture, followed by alternating layers of zucchini and tomato.
- Add the Cheese and Bake: Top with Gruyère and breadcrumb mixture.
- Bake to Golden Perfection: Bake for 30-40 minutes until golden brown and bubbly.
Notes
Serve warm with fresh herbs. Can be customized with other vegetables or cheeses.
- Prep Time: 60 minutes
- Cook Time: 30 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: Mediterranean
Nutrition
- Serving Size: 1 serving
- Calories: 350
- Sugar: 5g
- Sodium: 400mg
- Fat: 22g
- Saturated Fat: 8g
- Unsaturated Fat: 12g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 5g
- Protein: 15g
- Cholesterol: 30mg