Thank you Hermione. I also found a reference to onions in "Death and Salvation in Ancient Egypt by JAN ASSMANN Translated from the German by DAVID LORTON" published by Cornell University 2005:
Quote
p230:
May I follow Sokar with onions around my neck
on the day of the NTrj.t-festival.
Quote
p232:
These texts tell us of the special roles that individuals wished to play in these festivals, such as that of the helmsman in the neshmet-barque; of spe- cific insignia they wished to wear, such as the faïence pendant and the clothing of red material during the festival of Sakhmet or the wreath of onions during the henu procession;
Quote
p266:
In the case of the festival of Sokar, it was the night called NTry.t, “the Divine,” when the participants wore garlands of onions, while in the case of the Abydos festival, the nocturnal festival that preceded the procession in the morning bore the enigmatic name “Haker.”19 ZDr.t or zDrj.t “spend- ing the night” designates what is to be understood as “wake"
