Leek and Potato Gratin (with Tarragon)

If you're looking for the ultimate comfort food, this Leek and Potato Gratin with Tarragon hits the spot. Rich, creamy, and packed with flavor, it's a versatile vegetarian main course or an elegant side dish that pairs beautifully with roasted meats or a crisp green salad.

Why You'll Love This Gratin

• 🍽️ Elegant yet easy – Thinly sliced potatoes layered with sautéed leeks and garlic, then smothered in cream and herbs.
• 🌿 Fresh tarragon – A standout herb that lifts this dish with subtle anise notes.
• 🧀 Cheesy topping – A golden crown of Gruyère or cheddar adds depth and indulgence.
• 🥔 Great for prepping ahead – Assemble it in the morning, bake in the evening.

Ingredients You'll Need

This recipe uses simple ingredients with big flavor:

• Potatoes – waxy or all-purpose work best.
• Leeks – softened in butter with garlic.
• Double cream (or mix with milk for a lighter texture).
• Tarragon – fresh is best, but dried can be used in a pinch.
• Cheese – Gruyère, cheddar, or a combo.
• Nutmeg, salt, and pepper – to season and enhance the aroma.

Step-by-Step Instructions

1. Prepare the Leeks

In a saucepan, sauté the sliced leeks and garlic in butter for 3–5 minutes until soft. Season with a pinch of salt and set aside.

2. Layer the Gratin

Grease a baking dish. Begin layering the potatoes, followed by leeks and cheese. Repeat until all ingredients are used.

3. Add the Cream Mixture

In a bowl, combine double cream, chopped tarragon, a pinch of nutmeg, salt, and pepper. Pour this mixture evenly over the potato layers.

4. Bake Until Golden

Top the gratin with the remaining cheese. Bake uncovered at 180–190°C (355–375°F) for 35–40 minutes. It should be golden, bubbling, and irresistible. Rest for 5 minutes before serving.

Tips for Success

• A mandoline ensures uniform potato slices that cook evenly.
• You can prep the dish a few hours in advance and bake it when needed.
• For extra crispiness, finish under the broiler for 2–3 minutes.

Serving Suggestions

Serve this gratin alongside:

• A roast chicken or lamb shoulder
• Light salad with lemon vinaigrette
• Sautéed greens like spinach or kale

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💬 Have you tried this recipe? Leave a comment and let us know how it turned out!