What is Scran?
In many ways that's for you to tell (or actually show us).
However if you want a definition of Scran, then here goes...
Originally a term from Scotland meaning scraps of food : leftovers; also : grub, provision.
It is still considered a slang term for food; provisions but has in recent terms started to get much more into our general dialect when describing rich, exciting, great, appetising grub!
To be clear, not all food is worthy of being SCRAN!