This is the 16608th most frequent Turkish word.
yiyeceği
"The food" or "the thing to be eaten."
The word 'yiyeceği' means 'that he/she is going to eat' and serves as the relative form of the verb 'ye' (to eat), referring to the action related to the snack.
Çocuğun yiyeceği ara öğün çok sağlıklıydı.
The snack that the child was going to eat was very healthy.
Here, 'yiyeceği' indicates the dessert in connection with the action 'to eat' by the person being described.
O, yiyeceği tatlıyı çok sevdi.
He/she liked the dessert that he/she was going to eat very much.
In this case, 'yiyeceği' ties the meal to the action of it being eaten by the guests.