QUOTE (Xi @ Feb 29 2008, 12:35 AM)

Theoretically you'd be able to squeeze fruit directly onto food (but practically you don't, according to most), and the OP takes it a step further (or closer to muttar?). Which is a thread I wanted to start today, about following a singular opinion out of deference and respect.
With regard to lemons -- is it only lemons or is it all derabanan fruits?
Lemons are special since the mechaber even holds they can always be squeezed unconditionally. (We don't hold that however!)
This is an interesting case of halachah changing, melech!
The Bais Yosef writes (Page 434 in the Machon Tur 5 lines from the bottom) that the Jews in Egypt would squeeze lemons into sugared water on Shabbos (that's how old lemonade is!) and they were not rebuked or restricted from doing so. He gives a couple of reason. One being basically since lemons in the whole world are never ever squeezed for their juices alone (i.e. no one stored pure lemon juice in barrels) it was permitted.
Today however the halacha changes since today we do store and sell pure lemon juice in bottles and making such lemonade on Shabbos would be 100% assuer. Imagine that, halacha changes.
MS - Peaches are squeezed for their juice somewhere in the world so they would be just as forbidden. (My Rebbe said today just about ALL fruit and Vegetables even are squeezed for juices somewhere in the world and would be assur to squeeze on shabbos without fulfilling a bunch of conditions like Moshi wrote.