First off, let me say that is the stupidest picture ever and whoever made that (If they were serious in making it) should be killed.
Now onto your questions. My party is roving the wilderness clearing out bandits, so we eat when we can. We usually RP out four meals (One while finishing our watch, breakfast, one while on the road, a travel snack of nuts and berries, one while breaking, a lunch, and a final one before starting our watch, dinner.)
We tend to eat a mix of meats or fish, cheese, bread, and ale/wine. Sometimes we add some moonradishes, or fangberries, or other fruits or veggies we find to the bunch.
What do we prefer to eat? Whatever we can get our hands on.
What do they avoid to eat? Each other.
We actually cook a dinner for our game, so that is why it is important. We cook what would be available to our players, so usually European style stews as we are in a Russia like area in game.