Sauce Paloise — Mint Béarnaise

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Paloise is béarnaise with mint replacing tarragon — a single substitution that transforms the sauce from a steak accompaniment into the definitive partner for spring lamb. Named for the city of Pau in the Béarn region of southwestern France (making it, confusingly, a Béarnaise that is not béarnaise), it was created in the early 20th century to accompany the local Pyrenean lamb. The technique is identical to béarnaise with one critical difference: where béarnaise infuses tarragon and chervil stems in the vinegar reduction, Paloise infuses fresh mint stems and crushed black peppercorns. Combine 100ml of white wine vinegar, 50ml of dry white wine, 2 tablespoons of chopped mint stems (not leaves — the stems carry flavour without the chlorophyll that would colour the reduction green), 1 tablespoon of crushed peppercorns, and 1 minced shallot. Reduce by three-quarters until nearly dry. Strain, cool slightly. Whisk 3 egg yolks into the warm reduction over gentle heat until thick and pale. Add 200g of clarified butter in a thin stream, whisking constantly, until the emulsion is stable. Season with salt and a squeeze of lemon juice. Finish with 2 tablespoons of fresh mint leaves, finely chopped — a chiffonade so fine the leaves are almost pulverised. These go in at the end to preserve their vivid green colour and volatile menthol oils. The finished Paloise should be pale gold flecked with bright green mint, with the same buttery richness as béarnaise but a completely different aromatic profile. The mint should be present on the nose before the sauce reaches the mouth — menthol is volatile and announces itself. On the palate, it should taste of butter, then mint, then the shallot-and-pepper depth of the reduction. The combination of lamb and mint is ancient and cross-cultural — the British serve mint sauce, the Italians use mentuccia, the North Africans pair lamb with fresh spearmint. Paloise is the French contribution to this universal partnership, and it may be the most refined.

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