As far as I understand eating before sleep raises your pulse as more blood has to flow through your intestines and thus usually leads to less deep sleep.
It might damage your sleep in a way that leads you to be less rested the next morning even through you don't notice that you had trouble entering sleep.
It might be useful to be more clear about what kind of food to eat when you find that eating something is good.
Personally, I can eat a bit of soup before going to bed without producing much spike in heart-rate.
If you want to explore the community more, I recommend reading the Library, checking recent Curated posts, seeing if there are any meetups in your area, and checking out the Getting Started section of the LessWrong FAQ.
The Open Thread sequence is here.