Hi,
Is your hammy is Syrian ? I have Syrian and live in the uk and we have your hazel hamster equivalent and is called Harry hamster which most of hamster owners recommend and feed their hammy. I personally feed my Syrian 50/50 Harry hamster and burgess dwarf mix.
I'm sure soon people come along tell their favourite food. I'd say you should state your hamster breed.
Good luck for your brand new hammy