(Note: firstly, we don't do Thanksgiving in my country. Secondly, I'm unwell right now and my participation in this thread may be limited. Having said that ...)
Let us postulate that some time in the next 50 years, some astronauts from Earth set out for Mars. As they're going to be there for some years — possibly on a one-way mission: Mars is too expensive and hard to get home from for a quick dash and plant-the-flag excursion a la Apollo — they're going to be growing their own food and recycling everything. They're going to have very restricted weight allowances for what they can take with them, and possibly no or minimal artificial-gravity on the voyage out.
Let's also postulate that for reasons of morale they decide to have a shindig to mark 365 days on Mars.
In the absence of natives bearing turducken roast, what are they likely to be eating? (In addition to the couple of kilograms of precious delicacies from Earth they brought along for the purpose.)