Beetle Jelly is a fruit-based food which originated in Japan (I think) and is primarily sold as food for scarab and lucanid beetles. It would probably be good for cockroaches too, but the ingredients should be checked thoroughly.
Are there some ingredients that I should be aware of if I want to try these luxurious jellies? Funny though, some of them seem to be just brown sugar, honey and banana :blink: . Maybe I'll just give those foods fresh and not in a tiny plastic cup...