Can I put an oven shelf directly on a plata to place a cold liquid dish on it to heat it up on shabbos ?
If the liquid dish will reach yad soledes bo, it is not allowed
is this for all or just for sefaradim? Because there is a difference of ain bishul achar bishul between ashkenazim and sefaradim?
Applies to all. In this case there’s no difference between Ashkenazim and Sephardim