I always learned that it's forbidden to, for example, stir cholent while it's still on the blech/hot plate on shabbos, or to serve it straight from the blech/hot plate. Rather, one must remove the pot from the blech/hot plate first with the intention of returning it to the blech/hot plate.
I have some family through marriage who observe some Sephardic customs, and they both stir the cholent while on the blech/hot plate, and also serve it straight from the blech/hot plate. When I've asked them about it, they say Sephardic halacha is different. I haven't been able to find any source which does allow it, and I'm curious what the source is, or if someone is confused?