On formal night on Voyager a few nights ago, I was completed surprised when I saw a cheeseburger with fries whisked to a nearby table to a woman (late 40's/early 50's) at a table for two. I think her tablemate may have had meatloaf as it didn't look like anything recognizable on the menu (and it did look like meatloaf).
As others have said, they will try to accomodate your food preferences, particularly if notified at the beginning of the cruise or the night before.
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!