Add capers and cornichons

Add the chopped capers and cornichons. “If you’ve noticed I haven’t added any salt, it draws out the moisture. It will start to oxidize, so we’re going to add that in the end,” says Bergman. Once incorporated, gently fold in the chervil — you don’t want to bruise it. If it looks a little dry at this point, add more grapeseed oil.