In our city the Rav (who is also the Chabad shaliach – emissary,) makes Kiddush on Friday night, because there is no-one else available who can do it, however, for health reasons he is not supposed to drink wine or grape-juice. Due to this, he gives the wine to someone else to drink, in the required measure of ‘a full sip’, which according to Halacha is between 40 – 45 grams, and he himself tastes it. Now he has difficulty even with tasting it, so he asks whether he should make Kiddush on challos and not on wine at all, or should he make it on wine and give it to some-one else to drink?