This summer we sailed on Enchantment (from Baltimore) and Voyager (from Copenhagen). We've also sailed out of Rome on Jewel.
There are always a few, unique choices on the European menu. On Voyager this year it usually included a British-style dish. There is always an Indian dish on the menu (though on any ship you can order Indian food in the MDR, it's just more "secret")
Overall, the quality of food we've had in the MDR on our two European sailings was far better than our US sailings. I think they get better produce and meats and other fresh ingredients from their European suppliers.