I could see Emmett eating tacos! He'd be a good taco-eater.
I think Alice would eat something sugary, like cotton candy or something like that.
Rosalie would eat a diet pill. Just kidding, she would eat ...? I don't know. Maybe a fish like sole or maybe a salad?
Edward would eat pizza and wedding cake. Good call!
Jasper would eat a doughnut. I don't know why but I can just imagine him really enjoying a doughnut. Maybe it would make him happy.
Esme would eat chocolate cake or chocolate ice crea.
Carlisle would eat everything. Most ways food is prepared today wasn't around when he was human. He'd be curious to try everything.
Just my opinion. What do you think?