[Avodah] [Areivim] Kitnyos

[Dov Bloom]

It is not clear to all poskim that soybeans and similar products that were unknown at the time of the development of the gezeira/minhag of kitniot are "clearly included". 
A prominent Posek that clearly held otherwise was R Shaul Yisraeli Z"l who ate and served products that some osser but he held were not known in Europe and such were not part of the minhag. RMF's tshuva on peanuts was already mentioned. The Melameds - father and son hold similar views mi-ikar hadin as do many others who learned from R Yisraeli.

>> As for mustrad wants that becomes the minhag it is included.
>> RMF and  other say that anything not included in the original custom
>> like peanuts is not included later even if it is technically kitniyot
>
>That can't be true, because corn was not in the original gezera,
>and yet everyone agrees that "terkishe veitz" is forbidden.  The
>same goes for soybeans: unknown in Europe at the time of the original
>gezera, and yet clearly included.