Crème d’Oseille à l’Avoine

Ingredients

Equipment Needed

• •4-quart heavy-bottomed saucepan
• •Heat diffuser
• •Wide sauté pan
• •Immersion blender
• •Fine-mesh sieve
• •Sturdy ladle or flexible bowl scraper

Instructions

1. 1

   Dilute the oatmeal

   Whisk the fine oatmeal into the cold milk until every grain is wet and no dry pockets remain. It will look loose, which is exactly right. This cold dilution lets the oatmeal enter the hot milk evenly instead of setting into stubborn knots.

2. 2

   Reach the first boil

   Bring the larger quantity of whole milk and three-quarters of the salt to a boil in a heavy saucepan, stirring across the bottom as it heats. Lower the heat slightly and pour in the oatmeal mixture in a thin stream while whisking continuously. Stir until the soup returns just to the boil. If small lumps form, take the pan off the heat and whisk hard, or give it ten seconds with an immersion blender before continuing.

3. 3

   Simmer long and low

   Move the saucepan to your smallest burner, preferably over a heat diffuser, and leave the lid slightly ajar. Hold the soup at the barest simmer for two full hours, with one slow bubble breaking the surface every few seconds. Stir across the entire pan floor every ten minutes, then more often as the oatmeal thickens. This long cooking is the dish: the grains swell, lose their raw taste, and form the smooth liaison. If the bottom catches, stop stirring immediately and pour the unburnt soup into a clean saucepan without scraping the scorched layer. Add a spoonful of warm milk and continue gently. Ça se rattrape.

   A hard boil does not shorten the work. It scorches the milk, tightens the oatmeal unevenly, and costs you the clean ivory-green colour.
4. 4

   Make the Fondue

   When the oatmeal has cooked for one hour and forty-five minutes, melt the three tablespoons of butter in a wide pan over medium-low heat. Add the dry sorrel and the remaining salt. Turn the leaves constantly until they collapse into a dull green pulp and their free moisture has evaporated, about eight to ten minutes. This is the Fondue. Do not let it brown; if the edges begin to colour, lower the heat, stir in a tablespoon of warm milk, and cook gently until pulpy again. You should have about eight tablespoons (120 ml / roughly 120 g).

5. 5

   Fold in the sorrel

   After the oatmeal has completed its full two-hour simmer, scrape in all the Fondue and stir until its colour runs evenly through the soup. Keep the mixture at a bare tremble for fifteen minutes, stirring often. The oat starch protects the milk from sorrel’s acidity when the heat stays gentle. If the soup looks grainy, remove it from the heat and blend briefly before passing it through the sieve.

6. 6

   Pass it fine

   Blend the soup briefly to help it through the home sieve, then ladle it into a fine-mesh sieve set over a clean bowl. Press firmly with the back of the ladle and scrape the underside so none of the smooth cream is lost. Discard the coarse oat husks and sorrel fibres. A blender alone cannot replace this step; the tammy has changed, but the final passing stays.

7. 7

   Finish the cream

   Return the sieved soup to a clean saucepan over low heat and whisk in the warm cream. If it is thicker than pouring custard, loosen it with warm milk a tablespoon at a time; if it is thin, simmer it gently before adding the finishing butter. Taste for salt, remove the pan from the heat, and whisk in the cold butter a few pieces at a time until the surface takes on a quiet gloss. Do not boil after the butter goes in. Serve at once in warmed bowls. À table!

Chef Tips

• •Fine oatmeal means ground whole oats, not sweetened packet porridge. If you cannot buy it, pulse plain old-fashioned rolled oats until they resemble coarse flour, then weigh the amount after grinding.
• •Fresh sorrel should taste keenly lemony and green. If the season has passed, plain frozen sorrel purée is the classical pantry’s honest answer; thaw 120 g, squeeze away excess water, and cook it with the butter into the Fondue.
• •Spinach sharpened with lemon makes a pleasant cream soup, but it does not become Crème d’Oseille à l’Avoine. Sorrel’s acidity is part of the structure, not a decorative flavour.
• •Serve this without a busy garnish. Its pleasure is the perfectly smooth, pale green surface and the butter gleaming at the rim. A dry white wine with brisk acidity sits comfortably beside it.

Advance Preparation

• •The Fondue can be prepared up to two days ahead, cooled, covered, and kept cold. Bring it to room temperature while the oatmeal cooks.
• •The oatmeal and sorrel base can be made one day ahead through the sieving step. Cool it promptly, cover, and keep it cold; reheat over gentle heat before adding the cream and finishing butter.
• •A finished batch keeps for three days in the cold. Reheat it slowly and whisk in a spoonful of milk if the oatmeal has tightened overnight.

Frequently Asked Questions

Nutrition Information

1 serving (about 250g)