Leek Fondue (The Slow Sweat)

What It Is

A fondue here means melted, not cheese — leeks cooked low and slow in butter until they break down into a soft, sweet, almost jammy base. The whole point is no colour.

Why It Matters

Browning brings bitterness and a roasted note that fights delicate toppings like oysters. A patient colourless sweat keeps the leek sweet and clean, and reduces its water so the base is silky rather than soupy.

How to Execute

• Halve and wash the leeks thoroughly (grit hides between the layers); slice thinly.
• Melt butter over low heat, add the leeks with a pinch of salt — salt early to help them release water.
• Cook gently ~10 min, stirring, until completely soft. If they start to colour, drop the heat.
• Enrich with a little cream and reduce until thick.

Common Mistakes

• Heat too high — colour and bitterness.
• Under-washing — gritty fondue.
• Rushing; the silkiness only comes with time.