For this easy, impressive hors d'oeuvre, Jacques Pépin tops roasted fingerling potatoes with sour cream and slender diamonds of pressed caviar. Boiled, sliced red potatoes also work.
I fully admit that around this time of year I go a little squash crazy (examples: mashed with mascarpone, curried in soup, curried in another soup, in pasta with bacon, in farro salad). I tend to …