Humble Leeks, All Dressed Up
Leeks rarely get the spotlight. They’re usually playing backup in a soup or a braise, quietly doing the heavy lifting. But give them a gently braise in butter and thyme, and something wonderful happens: they turn silky, sweet, and so tender you can cut them with a fork. This is a great dish for someone who enjoys onions, but prefers a milder flavor.
This is my take on poireaux vinaigrette, the leeks vinaigrette you’ll find on nearly every Parisian bistro menu. The warm leeks drink in a bright, mustardy sherry vinaigrette, then marinate until every layer is seasoned through. Just before serving, I grate hard-boiled eggs right over the top (they fall like fresh snow and melt into the dressing, adding a creamy richness!), then scatter on toasted hazelnuts for crunch and a sprinkling of chives. Every bite is buttery, tangy, rich, and crisp all at once.
And here’s the part I love most: it’s served at room temperature and made ahead, which makes it the most stress-free side dish you’ll ever put on a holiday table. 🙌🏻
What You’ll Need
How To Make Braised Leeks Vinaigrette
This recipe is mostly hands-off (yay!). The stove and the marinade do the work, and the payoff is huge. Leeks are notorious for hiding grit, so be thorough when washing.
Make the Vinaigrette
My Biggest Tip From Recipe Testing
Drain after braising!
Warm leeks absorb dressing dressing in a way cold ones simply don’t.
Make It Ahead (Seriously, Do)
This might be the ultimate make-ahead side dish for the holidays. No oven space, no need to reheat, and the flavor intensifies the longer it soaks up the vinaigrette. An absolute entertaining win!
- Up to 2 days ahead: Braise, drain, and dress the leeks, then cover and refrigerate.
- Hazelnuts can be toasted up to 1 week ahead. Keep covered at room temp.
- Eggs can of course also be cooked several days ahead. Keep in a fridge.
Just let everything sit out for about 45 minutes before serving, as this one is not meant to be enjoyed cold.
Make It A Complete Meal
I love serving braised leeks as a first course with crusty bread (or a basket of cheesy Gruyère popovers) for swiping up the extra vinaigrette. As a side, they’re gorgeous next to my roast tarragon chicken with a white wine sauce or tender slow-baked salmon, since the Dijon and acidity cut through anything rich.
Planning Thanksgiving? Set these out next to a juicy spatchcock turkey or my always-impressive porchetta-style turkey roulade. 💯
Pouring wine? Vinaigrette can be tricky, so reach for something crisp and high-acid, like a Sauvignon Blanc from the Loire, a Muscadet, or a dry Riesling.
Silky, tangy, rich, and crunchy all at once, these braised leeks prove that the humblest vegetable can be the showstopper of the table. Make them a day ahead, set them out, and enjoy the compliments. 👩🏻🍳
If these braised leeks with Dijon vinaigrette make it onto your holiday table, I’d love it if you’d leave a ⭐️⭐️⭐️⭐️⭐️ star rating and review below!
And make sure to sign up for our newsletter and follow along on Instagram, TikTok, YouTube, Pinterest, and Facebook for more Well Seasoned recipes! Don’t forget to tag us on social channels when you make a recipe at #wellseasonedstudio and upload your photos below! We love seeing what you’re up to in the kitchen!
Tell Us What You Think!
If you make this recipe, don’t forget to leave a review and rating—we value your feedback and it helps us keep creating (and sharing!) free recipes. Your support means the world!
Rate this Recipe
Braised Leeks with Dijon Vinaigrette, Eggs, & Hazelnuts
Equipment
Ingredients
For the Leeks
- 6 medium leeks, about 3 lb
- 2 cups (480ml) water or low-sodium chicken broth
- 2 Tbsp (28g) unsalted butter, cubed
- 1½ tsp kosher salt
- 2 springs fresh thyme
- 1 dried bay leaf
For the Dijon Vinaigrette
- 1 small shallot, finely chopped
- 2 Tbsp (30ml) sherry vinegar
- ½ tsp kosher salt
- 1 Tbsp (15g) Dijon mustard
- ¼ cup (90ml) extra-virgin olive oil
- Freshly ground black pepper
To Finish
- 2 large eggs, hard-boiled and peeled
- ⅓ cup (45g) hazelnuts, toasted, skin removed, and roughly chopped
- 2 Tbsp fresh sliced chives (I like this sliced on the larger size for a fun presentation) – parsley works fine too!
- Flaky sea salt
Instructions
- Trim the leeks. Cut off the dark green tops, leaving the white and pale green portions. Trim the root end but leave the root plate intact (it’s the only thing holding the layers together through the braise). Halve each leek lengthwise through the root.
- Rinse. Hold each half under cold running water, fanning the layers apart to flush out any grit. Leeks are notorious for holding onto dirt! Drain cut side down.
- Braise. Arrange the leeks cut side down in a single snug layer in a wide sauté pan or Dutch oven. Add 2 cups (480ml) water or stock — it should come up about halfway — along with 2 Tbsp (28g) cubed butter, 1½ tsp kosher salt, 2 sprigs of thyme, and a bay leaf. Bring to a simmer, then cover, reduce the heat to low, and cook until a knife slides into the thickest part with no resistance, 20-25 minutes.
- Drain. Lift the leeks out with a slotted spatula and lay them cut side down on a couple paper towels. Let them drain for 10 minutes, then press gently but firmly with another towel to expel as much liquid as possible. This is the step that decides whether the dish works. Leeks hold a startling amount of water, and any that stays behind will leak out and dilute the vinaigrette into a thin puddle.
- Make the vinaigrette. While the leeks drain, combine chopped shallot, 2 Tbsp (30ml) sherry, and ½ tsp kosher salt in a bowl. Let this sit for 10 minutes to temper the shallot. Whisk in 1 Tbsp (15g) Dijon mustard, then add ¼ cup (90ml) olive oil in a slow stream, whisking constantly, until emulsified. Season with black pepper.
- Dress while warm. Arrange the leeks cut side up in a shallow serving dish or on a rimmed platter. Spoon about ¾ of the vinaigrette over them while still warm. Warm leeks absorb dressing the way cold ones simply don’t.
- Marinate. Cover and let stand at room temperature for 2 hours, or refrigerate up to 2 days. If chilled, pull them out 45 minutes before serving, as this is meant to be room temperature. (The flavors will be muted if cold.)
- Grate the eggs. Just before serving, grate the peeled hard-boiled eggs directly over the leeks using a microplane. It’ll look snowy in texture.
- Finish and serve. Coarsely chop the toasted hazelnuts and scatter over the top, along with fresh chives. Spoon over the reserved vinaigrette, finish with flaky sea salt, and a little black pepper. Enjoy at room temp!
Notes
- Ideal make-ahead dish for a holiday meal because it occupies no oven space, requires no reheating, and is actively better the next day.
- If using large leeks, you may need to peel off the outer layer if it feels tough.
- To toast hazelnuts: Toast at 350°F (175°C) for 10-12 minutes. Wrap in a clean kitchen towel, let steam for 1 minute, then rub vigorously. Some skin will cling (totally fine), but the majority will come off.
Nutrition
Photography by Megan McKeehan.
Let us know your thoughts!