Cruise lines are usually much more aggressive about food handling than restaraunts or even home cooking. They know that the bad publicity if they were the cause of any food poisoning would be disastrous. The media would love to do endless reports if that happened.
Eating in ports is a whole different story. There, I'm very cautious.
So, as said by silverbolt, unless you have food allergies, don't worry about it. My rule on cruises is if it looks good, taste it. If it tastes good, eat it.