How do you make your chicken casserole special? πŸ˜‰

Je
Tonight I made chicken casserole for supper. I purposely made it a bit bland because my son is just getting over a stomach bug. 😷 
Next time I would like to change the way I make and try something new. I know it's just chicken casserole but it seems everyone has a way to add their own twist to it. 
What do you do/add to make your chicken casserole to make it special?