I just got off the Magic on 9/27 and will agree that the Orange Mango embarkation lunch soup is the best!
I don't think you can go wrong with any dessert on the menu, but the Creme Brulee at Lumiere's was my favorite.
For entries, the Maple Glazed Salmon is quite good (if you like salmon), and on Friday at Lumiere's I had some kind of pork roast with a bourbon sauce, the sauce was great! (I don't see this entree listed on any of the posted menus, wonder if it is new or I'm just not seeing it.) It was served on a bed of pureed white corn with a little tower of acorn squash next to it.
Several people told me the pan fried veal chop was fantastic, I can't vouch for this personally.
Everybody at our table who ordered the baked potato said it was great.
My best advice is to listen to your waiter's suggestions, they know what they are talking about. And if you do order something that you find is not to your liking, just let them know and they will bring something else, so don't be afraid to be adventurous.