Salade Lyonnaise — Frisée, Lardons, and Poached Egg

Ingredients

• 4 heads Frisée (Cichorium endivia var. crispum), blanched hearts only — pale yellow-white interior leaves, dark outer fronds discarded
• 200 g Slab bacon or poitrine fumée, cut into uniform lardons of 5 mm × 5 mm × 25 mm
• 4 Eggs, very fresh
• For the warm vinaigrette
• 120 ml Sherry vinegar or aged red wine vinegar, 30 ml per portion; aged sherry vinegar of minimum 25-year solera preferred
• 60 ml Dijon mustard (Brassica juncea), 15 ml per portion; whisked in off heat
• For the poaching water
• 80 ml White vinegar, 20 ml per litre of water, to acidulate
• To finish
• 1 pinch Cracked black pepper
• 10 g Chives (Allium schoenoprasum), minced

Method

1. 1
   Bring a wide, deep saucepan of water to 82–85 °C. Add white vinegar at 20 ml per litre. Hold temperature with a thermometer — no simmering bubbles, only the faintest tremor at the base of the pan. The water is ready when a thermometer reads steadily in this band and the surface is still.
2. 2
   Place the lardons in a dry sauteuse over medium heat (160 °C). Render with frequent agitation for 5–7 minutes until the exterior of each baton is golden-crisp and the interior retains a core of unctuousness. Remove the lardons with a slotted spoon and drain. Reserve all rendered fat in the pan. The lardons are done when the surface takes on an even, deep gold without scorching and the fat runs clear.
3. 3
   Working from a ramekin, slip each egg into the acidulated water and poach for exactly 3.5–4 minutes. The egg is done when the white is fully opaque and set on all sides while the yolk visibly yields to the gentlest touch of a spoon — a fluid, golden centre intact within a firm casing. Remove with a perforated spoon and blot gently on a clean towel.
4. 4
   This is where the dish lives or dies. Return the sauteuse with the rendered lardon fat to medium heat. Add the sherry vinegar (30 ml per portion) and deglaze aggressively, scraping all fond from the pan until the hiss subsides and the vinegar has reduced by half. Remove from heat. Whisk in the Dijon mustard immediately, off the flame, to form a broken, intentionally rustic warm vinaigrette. The dressing must go onto the frisée at once — if it cools, the thermal wilt that softens the greens is lost irreversibly.
5. 5
   Add the frisée hearts directly to the hot vinaigrette in the pan and toss briefly until the leaves soften at their edges while retaining structure at the core — this takes no more than 20–30 seconds. The leaves are ready when they yield slightly and the pale yellow colour deepens very faintly without collapse.
6. 6
   Mound the dressed frisée immediately on a warmed plate. Scatter the lardons evenly over the greens. Crown with the poached egg. Finish with cracked black pepper and minced chives. Serve within 90 seconds of assembly — the salad cannot hold without irreversible wilting and yolk setting. The diner breaks the yolk tableside, releasing a second, richer dressing that coats every element on the plate.