Wiktionary
midnight feast
n. (context British English) A snack, usually substantial, eaten at or around midnight, a while after supper and a while before breakfast.
Usage examples of "midnight feast".
When I caught Humphrey in the act of making you a midnight feast, it seemed a pity not to make a social occasion of it.
Maybe the maids thought she was going to try and dress up as a man and spring some stupid childish prank on Tariq, not to mention a less than inviting midnight feast of bread and water.