sandwich to be honest, cause you can have it in a savoury way ( like subway ), also in a form of pizza, in a form of lasagna even. not to forget you can also get with desserts ( icecream, fruits and more).
- a bonus for yall dirty-minded XD : a sandwich of you know ;) but yeah
this is my answer but 100% totally for the upper part of the details not the bonus kay :)