It often depends on embarking airport / country .. the last one was banh mi , local fruits ( lychee , mango , pineapple and soursop ) canned drinks picked up after scanning and chocolate from PH Saigon .. oh yes also their tiramisu ( takeout version which is not as delicious as their dine in ) & Azerai CanTho signature tiramisu , both which were frozen ..
Usually some cake and chocolates on all flights , sometimes a sandwich
From from lounges

:
FRA - pretzel & bratwurst
SIN - cha siew pau , har gau , egg mayo sandwich
Helps to have spare ziplocks from FS MAD & RAK !