I was very lucky to have been in Thailand just in time for many festivals including the Kathina Ceremony (Robe offering ceremony)
Very early in the morning, people would go to their favourite temple, cook some lovely food and offer to the monks. On the Kathina Ceremony day, people were not just cook and offer to the monks but also offer to the people who come to the temple too!
Fried Chicken Wings on top of Sticky Rice
Gluay-Tord (Thai Style Babana Split coated with coconut n sesame seed)
Tord-Mun-Bla (Thai Style Fish Cake)
Pao SunKaYa (similar to Jersey wonder but much less sugar - served with a creamy pandan flavour dipping)
Some of many kinds of fruit were also offered at the temple.
This was offered by Aunty Deet and her children.
Last but least (because there were more - loads!). My husband's favourite, 'snotty' a nickname of this kind that was given as per how it looks on the inside (not really, it's a joke lol). A very Thai coconutty creamy pudding like, filled with a tasty sweetie coconut ball and wrapped with banana leaf. ONLY IN THAILAND!