For Syrians,fruit is a good option for an occasional treat as long as the type of fruit is safe
I'd also recommend finding a safe fruits and vegetables list here,as well as a list of safe seeds and nuts since all of those are very beneficial if fed in moderation such as a healthy treat.Personally I'm a big fan of feeding any animal that can digest animal protein chicken breast,but turkey is also a good option and you can create a fresh vegetables and animal protein salad for your ham or some variation of a hamster safe recipe.There are tons of recipes out there on the internet but try to keep it simple and as healthy as possible