The Diapason Grand Cru Le Mesnil‑sur‑Oger Extra Brut from Pascal Doquet is a single‑terroir Blanc de Blancs sourced from the Grand Cru vineyards of Le Mesnil‑sur‑Oger. It is made from 100% Chardonnay with an Extra Brut dosage and is commonly offered as a non‑vintage cuvée. Pascal Doquet's estate is certified organic and aims to express the chalky character of the Côte des Blancs.