When are the Simanim on Rosh HAshanah(symbolic foods) eaten before washing on the Bread or after and at which meal and why?
Nitei Gavriel Rosh Hashana 29:2 says that it is a Machlokes whether it should be eaten after the Hamotzi (Tur, Darchei Moshe, Sidur Yaavetz, Sidur Hatanya, Mateh Efraim, Kitzur Shulchan Aruch, Likutei Maharich, etc.) or immediately after Kiddush (Maharil, Ohr Tzadikim, Sidur Rab Shabsai, Ruach Chaim, Ketzei Hamata, etc.).
I've usually seen them eaten after hamotzee on the first night, and often the second night too.
The simanim are eaten after Motzi, on both nights, but not the day.