Picture shows a jar of green mustard with tarragon sauce. The brand is Edmund Fallot. I bought it from UK-based mail order website Sous Chef.

We had some of this with our salmon tonight: green mustard with tarragon. It doesn't taste strongly enough of tarragon for my liking but is definitely acceptable. It's rather like horseradish. #Mustard #sauce #tarragon #CondimentsIHaveKnown