My wife forgot to take Challah on the challos she made made for Shabbos, and we realized this just before Kiddush. Is there anything we should have done?
In Israel, there is nothing to do, and the challos cannot be eaten before Challah is taken.
Outside Israel, however, it is permitted to eat the challos, and to leave a small portion of them over, which is declared as the Challah after Shabbos.
Shulchan Aruch 339; Kitzur Shulchan Aruch 35:9; Chayei Adam 44:22; for Pesach, see Peri Megadim, Eshel Avraham 506:8.