French Braised Leeks with Mustard Vinaigrette

Method

1. Trim and wash the leeks

   Trim the roots and tough dark-green tops from 800 g of medium leeks. Cut each leek lengthwise while keeping the layers nested. Rinse between the layers under cool running water, checking carefully for grit, then shake off the water and pat the cut surfaces dry.

2. Brown and braise the leeks

   

   Heat 15 ml of olive oil for braising in a wide skillet with a lid over medium heat. Place the leek halves cut-side down in a single snug layer and cook for 3 to 4 minutes, until the cut faces show light golden patches. Pour 240 ml of no-salt-added vegetable broth around the leeks, season with 2 g of fine sea salt for leeks and 1 g of black pepper, and bring the liquid to a gentle simmer. Cover, reduce the heat to low, and braise for 14 to 18 minutes, turning the leeks once with a wide spatula. Start checking at 14 minutes; they are ready when a small knife slides into the thickest part with little resistance and the halves still hold together.

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3. Make the mustard vinaigrette

   Mince 30 g of shallot and chop 15 g of fresh flat-leaf parsley. Whisk 22 g of Dijon mustard, 30 ml of red wine vinegar, and 1 g of fine sea salt for vinaigrette in a small bowl until smooth. Slowly whisk in 30 ml of extra-virgin olive oil for vinaigrette until the dressing looks glossy and lightly thickened. Stir in 30 g of shallot, 9 g of drained capers, and half of 15 g of fresh flat-leaf parsley.

4. Dress and serve

   Lift the braised leeks onto a serving platter and let excess liquid drain back into the skillet. Spoon the mustard vinaigrette evenly over the warm leeks, working some between the layers without pulling the halves apart. Let the dressed leeks stand for 5 minutes so the flavors settle, then scatter the rest of 15 g of fresh flat-leaf parsley over the top and serve warm or at room temperature.

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Smart Substitutions

• No red wine vinegar? Use Champagne vinegar or apple cider vinegar for a similarly clean acidity.
• No capers? Use finely chopped cornichons for a briny, crisp accent.
• No flat-leaf parsley? Use chervil or chives for a fresh finish.
• No vegetable broth? Braise with water and adjust the seasoning after the leeks are tender.

Tips and Variations

• Choose leeks of similar thickness so they become tender at the same time.
• Keep the root end barely attached until after cooking if the layers tend to separate.
• Dry the cut faces well before browning; surface water encourages steaming instead of color.

What Went Wrong?

• The leeks still taste gritty Open the layers more widely under running water and rinse from the root end toward the green end before cooking.
• The leeks are falling apart Lower the heat and stop cooking as soon as a knife enters easily; use a wide spatula for turning and lifting.
• The vinaigrette separates Whisk in a spoonful of the warm braising liquid until the dressing comes back together.
• The dressing tastes too sharp Let it sit on the warm leeks for the full 5 minutes; the vegetable sweetness and braising liquid will soften the acidity.

Nutrition Estimate

• Fiber: 4 g per serving
• Sodium: 455 mg per serving

Nutrition disclaimer:This recipe is provided for general cooking information only. Nutrition values are estimates and may vary by ingredients, brands, preparation methods, and serving sizes. Check ingredient labels and follow appropriate food-safety practices. This content is not medical, dietary, allergy, or professional food-safety advice.

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