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U.S. measurements first, metric equivalents in parentheses. Conversions are approximate; oz means weight ounces, not fluid ounces.
1 lb (450 g) haricots verts (thin green beans), trimmed 1 tbsp (15 g) kosher salt (for blanching water) 2 tbsp (30 g) unsalted butter 1 tbsp (15 ml) olive oil 2 shallots, thinly sliced 2 tbsp (30 ml) Champagne vinegar (or white wine vinegar) 1 tsp (5 ml) Dijon mustard 1 tsp (5 ml) lemon zest 1 tbsp (15 ml) fresh tarragon, finely chopped 1 tbsp (15 ml) fresh parsley, chopped (optional) 1 / 4 cup (30 g) sliced almonds, toasted (optional) Freshly ground black pepper, to taste Flaky sea salt, to finish
1 lb (450 g) haricots verts (thin green beans), trimmed 1 tbsp (15 g) kosher salt (for blanching water) 2 tbsp (30 g) unsalted butter 1 tbsp (15 ml) olive oil 2 shallots, thinly sliced 2 tbsp (30 ml) Champagne vinegar (or white wine vinegar) 1 tsp Dijon mustard 1 tsp lemon zest 1 tbsp fresh tarragon, finely chopped 1 tbsp fresh parsley, chopped (optional) 1 / 4 cup (30 g) sliced almonds, toasted (optional) Freshly ground black pepper, to taste Flaky sea salt, to finish
Bring a large pot of water to a boil; season generously with the kosher salt. Blanch haricots verts 2–3 minutes until crisp-tender, then transfer to an ice bath to stop cooking. Drain well and pat dry. In a large skillet over medium heat, melt the butter with the olive oil. Add the sliced shallots and cook 3–4 minutes until softened and lightly golden at the edges. Stir in the Champagne vinegar and Dijon; simmer 30–60 seconds to slightly reduce and meld. Add the dried haricots verts to the skillet and toss to coat; warm through 1–2 minutes. Remove from heat; add lemon zest, tarragon, and parsley (if using). Season with freshly ground black pepper and a pinch of flaky sea salt. Toss in toasted almonds if desired and serve immediately.
Per serving | Servings: 4
Nutrition estimated: November 5, 2026
*Values are estimates based on USDA data and mathematical calculations. Actual values may vary. Where data are unavailable, those contributions are excluded. Calories, Carbohydrates, Protein, Fat, Saturated fat, Fiber, Sugar, Sodium, Potassium, Calcium, Iron, Vitamin A and Vitamin C are known subtotals. Missing contributions are unknown, not zero.