avocado on toast, fruit & nakd bars and alooooot of tea & water (for the rest of the year I drink coffee too but in exam season I cut out caffeine except for tea)
i always forget to eat like.. even if I'm reminded constantly. So to make sure i don't die, mum puts a bowl of grapes in my general vicinity. I live on grapes
and quite the contrary to some of the posts here, nibbling is how i concentrate lmao.. its like the equivalent of chewing my pen or jiggling my leg idk it helps me