I've been reading and learning a lot about this period of time,but I haven't seen anything about their meals and choices of foods according to the part of day.
Greetings. Not to discourage further responses, but do check this older answer while you wait :
What did the people of 4th century (BC) athens eat? by u/Iphikrates
Hope this helps.
r/AskFoodHistorians might be another place for this one.