I AM frantically whisking my sabayon (egg yolks, sugar, wine) over a hot bain marie but it absolutely refuses to thicken. âCome on, guys, you need to finish this now!â barks Ann!. Sebastian, my cooking partner, isnât happy. âDid you prick the bottom of the tarts before putting them in the oven?â I have easily baked a thousand tarts in my life up to that point. Itâs straightforward, I know the drill. I flush. âChrist, I forgot!â Ann comes over to investigate. âMy sabayon wonât thicken,â I wail. âThatâs because the pot isnât properly over the induction ring,â says Ann.