Coulis — Puréed Vegetable or Fruit Sauce

A coulis is a smooth, strained purée of vegetables or fruit used as a sauce — thickened by nothing but its own body, unbound by roux or starch, relying entirely on the cellular structure of the main ingredient for texture. The word derives from couler (to flow), and that is exactly what a good coulis does: it flows from a spoon in a thick, unbroken stream, pooling on the plate with the consistency of heavy cream. For a vegetable coulis (red pepper is the archetype): roast 6 red peppers at 220°C until the skin blisters and blackens — 25-30 minutes. Steam in a covered bowl for 10 minutes (the steam loosens the skin). Peel, seed, and roughly chop. Blend at high speed for 2 full minutes — this breaks down the cell walls completely. Pass through a fine-mesh sieve, pressing firmly to extract all liquid. Season with salt, a drop of sherry vinegar, and a tablespoon of olive oil. The coulis should be vivid red, smooth as silk, and taste intensely of roasted pepper. For a fruit coulis (raspberry is the archetype): purée 500g of fresh or frozen raspberries with 50g of icing sugar (powdered sugar dissolves instantly without heat). Pass through a fine-mesh sieve to remove every seed — this is not optional. A single seed in a raspberry coulis ruins the texture. Season with a squeeze of lemon juice to brighten. The coulis should be vivid pink-red and flow in a thick ribbon. The quality of a coulis is determined entirely by two things: the quality of the main ingredient and the thoroughness of the straining. A coulis made from underripe peppers will be thin and bland. A coulis strained through a coarse sieve will have a gritty texture. There is nowhere to hide. In modern French cuisine, coulis has largely replaced the flour-thickened sauces of the classical canon for vegetable-based preparations. A red pepper coulis alongside grilled fish or a tomato coulis beneath a piece of burrata owes nothing to Escoffier's roux-based system — it is Nouvelle Cuisine's lasting contribution to the French sauce repertoire.