Renoir's sauce

[toggernut]

In Jean Renoir's biography of his father, Auguste, it is mentioned that Auguste detested sauces thickened with flour. I have for years been fascinated with a speculation on what that meant; did he like only thin sauces or those thickened by evaporation, or, possibly, it was flour that he objected to (i.e. cornstarch or arrowroot, etc. would be O.K.as a thickening agent).

[littleplum50]

Perhaps he was gluten intolerant !