A Taste of Provence: Layered Vegetable Gratin

The scent of thyme always whisks me back to my grandmother’s sun-drenched kitchen in the south of France. She had a way of coaxing magic from the simplest ingredients, especially vegetables. I remember her humming as she layered colorful slices of tomatoes, zucchini, and squash in a baking dish, the aroma of garlic and olive oil filling the air. It was more than just cooking; it was an act of love, a celebration of the season’s bounty. This Provencal Vegetable Gratin is an homage to her effortless artistry.

Recipe Overview

• Prep Time: 20 minutes
• Cook Time: 50-55 minutes
• Total Time: 1 hour 15 minutes
• Servings: 6-8
• Dietary Type: Vegetarian

Ingredients

• 5 tablespoons extra virgin olive oil, plus more for the dish
• 2 medium onions, thinly sliced
• 3 medium garlic cloves, minced
• 2 1/2 teaspoons kosher salt
• 1/4 cup fresh basil leaf, torn
• 2 teaspoons fresh thyme leaves, chopped
• 5-6 medium plum tomatoes, sliced into 1/4-inch rounds
• 2 medium zucchini, sliced into 1/4-inch rounds
• 2 medium summer squash, sliced into 1/4-inch rounds
• 1/2 cup Parmesan cheese, finely grated

Equipment Needed

• 7×11 inch baking dish
• Large skillet
• Aluminum foil

Instructions

1. Preheat your oven to 375 degrees F (190 degrees C).
2. Lightly grease a 7×11-inch baking dish with olive oil. This prevents sticking and helps the gratin release easily.
3. Heat 2 tablespoons of the olive oil in a large skillet over medium-low heat. The low heat is essential to prevent the garlic from burning.
4. Add the thinly sliced onions, minced garlic, and 1 teaspoon of the kosher salt to the skillet.
5. Cook, stirring occasionally, for about 5 minutes, or until the onions are completely softened and cooked through, but not browned. Browning the onions will add a bitter taste to the dish.
6. Stir in the torn fresh basil and chopped fresh thyme. This infuses the onion mixture with aromatic flavors.
7. Spread the onion mixture evenly on the bottom of the prepared baking dish. This forms the flavorful base for the vegetable layers.
8. In a large bowl, toss the sliced tomatoes, zucchini, and summer squash with the remaining 3 tablespoons of olive oil, 1 1/2 teaspoons of kosher salt, and a generous grind of fresh black pepper. Ensure the vegetables are well coated with oil and seasoning.
9. With the long side of the baking dish facing you, alternate the sliced vegetables in compact, upright rows on top of the onion mixture. Arrange the slices tightly, slightly overlapping each other, to create a visually appealing pattern.
10. Cover the dish tightly with aluminum foil. This helps to steam the vegetables and soften them thoroughly.
11. Bake for 30 to 35 minutes, or until the vegetables are tender when pierced with a fork.
12. Remove the aluminum foil and sprinkle the grated Parmesan cheese evenly over the top of the vegetables.
13. Continue baking, uncovered, for about 20 minutes, or until the cheese is melted and begins to brown and bubble. Keep a close eye on it to prevent burning.
14. Remove from the oven and let cool slightly before serving. Serve hot or at room temperature.

Expert Tips & Tricks

• For an even more intense flavor, try roasting a head of garlic and squeezing the softened cloves into the onion mixture.
• If you’re short on time, you can use pre-sliced vegetables, but be sure to adjust the cooking time as needed.
• Don’t overcrowd the skillet when cooking the onions. If necessary, cook them in batches to ensure they soften evenly.
• If the cheese starts to brown too quickly, loosely tent the gratin with foil during the last few minutes of baking.
• For a vegan version, substitute the Parmesan cheese with nutritional yeast or a vegan Parmesan alternative.

Serving & Storage Suggestions

This Provencal Vegetable Gratin is delicious served hot as a side dish or as a vegetarian main course. It pairs well with grilled fish, roasted chicken, or a simple green salad. Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, bake in a preheated oven at 350 degrees F (175 degrees C) until warmed through, or microwave in short intervals. Reheating in the oven will help retain the texture better. While freezing is possible, the texture of the vegetables might change upon thawing.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	275.9 kcal	N/A
Calories from Fat	N/A	69%
Total Fat	21 g	32%
Saturated Fat	4.6 g	23%
Cholesterol	11 mg	3%
Sodium	1299.3 mg	54%
Total Carbohydrate	16.6 g	5%
Dietary Fiber	4.1 g	16%
Sugars	8.4 g	N/A
Protein	8.6 g	17%

Note: Nutritional information is an estimate and may vary based on specific ingredients and portion sizes.

Variations & Substitutions

• Add Eggplant: Incorporate sliced eggplant for a heartier gratin. Lightly salt the eggplant slices and let them sit for 30 minutes to draw out excess moisture before adding them to the vegetable mixture.
• Spice it Up: Add a pinch of red pepper flakes to the onion mixture for a subtle kick of heat.
• Different Herbs: Experiment with other Mediterranean herbs like rosemary, oregano, or marjoram.
• Cheese Variations: Use Gruyere, mozzarella, or a blend of Italian cheeses instead of Parmesan.
• Tomato Sauce Base: Instead of just the onions, create a simple tomato sauce base with canned crushed tomatoes, garlic, and herbs.

FAQs (Frequently Asked Questions)

Q: Can I prepare this gratin ahead of time?
A: Yes, you can assemble the gratin up to a day in advance. Cover it tightly with plastic wrap and refrigerate. Add the Parmesan cheese just before baking.

Q: Can I use different vegetables?
A: Absolutely! Feel free to use other seasonal vegetables like bell peppers, fennel, or artichoke hearts.

Q: How do I prevent the vegetables from becoming too watery?
A: Salting the vegetables before baking helps to draw out excess moisture. Also, ensure the vegetables are sliced thinly and arranged tightly in the baking dish.

Q: Can I make this dish vegan?
A: Yes, simply omit the Parmesan cheese or substitute it with a vegan Parmesan cheese alternative or nutritional yeast.

Q: What’s the best way to reheat leftovers?
A: Reheat in a preheated oven at 350 degrees F (175 degrees C) until warmed through. This will help retain the texture and prevent the vegetables from becoming mushy.

Final Thoughts

This Provencal Vegetable Gratin is a celebration of fresh, seasonal flavors and a testament to the magic that can be created with simple ingredients. Whether you’re looking for a healthy side dish or a flavorful vegetarian meal, this gratin is sure to delight. Don’t be afraid to experiment with different vegetables and herbs to create your own unique version. I encourage you to try this recipe and share your feedback. Pair it with a crisp rosé wine and enjoy a taste of the Mediterranean!