Hi, If an Israeli salad was made with onions and mixed and left overnight but no lemon or salt was added (only a tiny bit of oil was poured over and not mixed) is it considered overnight onions? In general, is mixing onions or garlic with other vegetables without any salt, lemon or oil, allowed overnight?
The onions do not have to be mixed specifically with oil, lemon, or salt, and if they are mixed with other foods it is also sufficient to permit eating them. Therefore since it was mixed with the other vegetables it is fine to eat.
Smak MItzva 171, Halichos Shlomo (Tefillah) 2 ftnt. 103, Orchos Rabeinu 1 pg. 209-15, Shulchan Yosef Y:D 33, Shevet Hakehosi 2-247, Tzitz Eliezer 18-46(3), Habayis Bkashruso pg. 98 ftnt. 5 in the name of R’ N. Karelitz zt”l.