Lab Station 01 Modernist Recipe Book
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Specimen photograph for Butter-Braised Leeks

Butter-Braised Leeks

Yield
4 side portions; approximately 650 g finished leeks

October 2, 2026 · Version 1 · Side Dish

Leeks gently braised until silky, sweet, and glazed with their cooking liquor

Preparation

Scaling basis: Leek · 800 g

PHASE A — PREPARATION

Ingredient Uses

Method

  1. Cut leeks into 120 mm–150 mm lengths and halve lengthwise, keeping the root ends intact.
  2. Wash thoroughly between the layers and drain.

Phase Outputs

Key Phase Output Description
washed-leeks Washed leeks Prepared intermediate for a later Phase. Use all.

PHASE B — BRAISE

Ingredient Uses

Method

  1. Melt 50 g butter in a wide pan. Arrange leeks cut-side down in one layer.
  2. Add stock, salt, white pepper, and thyme. Bring to a gentle simmer.
  3. Cover with a lid or parchment cartouche and braise at 160 C for 30 min–40 min, until completely tender.

Technique Applications

Technique Controls Purpose
Braising 160 C; 30 min–40 min; completely tender Soften the leeks without separating their layers.

Phase Outputs Used

Phase Output Use
Washed leeks Use washed-leeks. Use all.

Phase Outputs

Key Phase Output Description
braised-leeks Braised leeks Prepared intermediate for a later Phase. Transfer all carefully to a warm plate.
braising-liquid Braising liquid Prepared intermediate for a later Phase. Reduce all, then finish with butter and lemon.

PHASE C — GLAZE

Ingredient Uses

Method

  1. Transfer leeks carefully to a warm plate.
  2. Reduce the braising liquid over medium heat until lightly syrupy.
  3. Whisk in remaining 30 g butter and lemon juice. Spoon over the leeks.

The exact stock needed depends on pan width. Avoid boiling aggressively, which can separate the layers before the core is tender.

Recorded alternatives (no separate variation-specific testing observations were supplied):

  • Brown-butter finish: Brown the final 30 g butter before whisking it into the reduced liquor.
  • Mustard glaze: Add 10 g Dijon mustard with the lemon juice.

Phase Outputs Used

Phase Output Use
Braised leeks Use braised-leeks. Transfer all carefully to a warm plate.
Braising liquid Use braising-liquid. Reduce all, then finish with butter and lemon.

FAILURE MODES

Symptom Likely cause Corrective action
Gritty leeks inadequate washing wash between layers
Broken leeks rough handling transfer carefully