Preserved lemons belong to the Moroccan and broader North African and Levantine preservation tradition — a technique for transforming a perishable acidic fruit into a deep, complex flavouring agent through salt-cure and fermentation. They appear throughout Ottolenghi's Jerusalem recipes as a background note of fermented citrus complexity that fresh lemon cannot replicate. The preservation is simple; the patience required is the only barrier.
Lemons packed in salt (and sometimes additional lemon juice) and left to ferment at room temperature for a minimum of four weeks. The salt draws moisture from the peel, the peel softens and ferments, and the bitter white pith transforms from harsh to mellow and complex. The flesh becomes intensely salty and sour; the peel becomes the prize.
Preserved lemon adds a background frequency that fresh lemon cannot — it reads as fermented, complex, slightly funky rather than simply acidic. It works in braises, dressings, compound butters, and anywhere that needs depth without heat. Use sparingly: a quarter preserved lemon rind in a dish for four is sufficient. Its flavour is concentrated far beyond what its volume suggests.
- Only the peel is used in cooking — the flesh is discarded or used only in braises where its intensity can diffuse - Salt quantity must be sufficient to create a brine — the lemons must be submerged. [VERIFY ratio: approximately 30g salt per lemon] - The lemons must stay submerged throughout — floating lemons develop mould on exposed surfaces - Minimum four weeks before the peel reaches full transformation — at two weeks the peel is still slightly bitter and the fermentation incomplete [VERIFY time] - Once opened, store in the refrigerator — the fermentation continues slowly and indefinitely at room temperature Decisive moment: Tasting the peel at four weeks — it should be soft, translucent, intensely salty, with complex fermented citrus flavour and no raw bitterness. If bitterness remains, seal and wait another week.
OTTOLENGHI JERUSALEM — Technique Entries OT-01 through OT-25