Introduction
Zucchini is a versatile ingredient that shines in a gratin, where it meets a lightly creamy custard and a sun-kissed crust. This zucchini gratin is approachable for weeknights and elegant enough for holiday tables. It highlights the vegetable’s gentle sweetness while delivering a comforting blend of textures: soft, tender layers mingling with a hint of crunch on top.
The dish works as a side to roasted chicken or fish, or as a modest main when paired with a bright salad and crusty bread. With a few pantry staples and a simple technique, you can turn a modest zucchini into a satisfying, make-ahead centerpiece.
Ingredients
- 2 medium zucchinis, thinly sliced (about 1/8 inch)
- 1 small onion, finely chopped
- 2 garlic cloves, minced
- 1 cup heavy cream or half-and-half
- 2 large eggs
- 1 cup shredded cheese (a mix of Gruyère or mozzarella with a bit of parmesan works well)
- 1/2 cup grated parmesan, plus extra for topping if desired
- 1/2 cup breadcrumbs or panko (optional for extra crunch; use gluten-free breadcrumbs if needed)
- 2 tablespoons olive oil
- Salt and pepper to taste
- Pinch of ground nutmeg (optional)
- Fresh herbs (such as thyme or parsley), for finishing (optional)
Method
- Preheat the oven to 375°F (190°C). Lightly oil a shallow baking dish to prevent sticking.
- Prepare the zucchini by trimming the ends and slicing as evenly as possible. This helps the gratin cook uniformly.
- In a small skillet, heat the olive oil over medium heat. Add the onion and cook until softened, about 4–5 minutes. Add the garlic and cook for another 30 seconds until fragrant. Remove from heat.
- In a medium bowl, whisk together the cream, eggs, salt, pepper, and nutmeg. Stir in half of the shredded cheese.
- Layer the dish: spread a light coat of the custard on the bottom. Arrange a layer of zucchini slices over the custard, then sprinkle with a little of the onion mixture. Repeat with remaining zucchini and onion, finishing with a final layer of the custard on top.
- Sprinkle the remaining cheese over the top, followed by breadcrumbs if using. Drizzle a tiny bit of olive oil over the surface to help it color.
- Bake for 40–45 minutes, or until the top is golden and the zucchini is tender when pierced with a knife. If the top browns too quickly, cover loosely with foil for the last 10 minutes.
- Let the gratin rest for about 10 minutes before slicing. This helps it set and makes serving easier.
Variations
- Cheese combinations: Try a mix of Gruyère and mozzarella for melt and flavor, or swap in a sharp cheddar with a touch of parmesan.
- Herb and spice twists: Swap thyme for chives or parsley, or add a pinch of smoked paprika for a subtle warmth.
- Greens and extras: Add a layer of spinach or thinly sliced mushrooms between zucchini layers for a heartier dish.
- Gluten-free option: Use gluten-free breadcrumbs or omit them entirely for a lighter finish.
Make ahead and storage
- Assembly tip: The dish can be assembled up to 24 hours in advance and kept refrigerated. Bake it from cold if you’ve prepped it ahead, adding a few extra minutes to the bake time.
- Leftovers: Store cooled slices in an airtight container in the fridge for up to 3 days. Reheat gently in the oven or a skillet to keep the top crisp.
Serving suggestions
- Pair it with a crisp green salad dressed with a tangy vinaigrette to balance the richness.
- Serve alongside a simple roasted chicken or grilled fish for a complete, comforting meal.
- A slice of crusty bread or a light white wine can complement the dish nicely.
Conclusion
Zucchini gratin offers a satisfying balance of creamy and crisp textures in a single dish, making it a reliable option for any table. With a handful of pantry staples and a straightforward technique, you can create a comforting dish that highlights fresh vegetables without fuss.