Another vote for the Boma buffet, here, too!
Another great one is the Concourse Steak House at the Contemporary. They have a delicious breakfast selection (love the eggs benedict), and that is the home of "Sticky Mickeys", which are like cinnamon buns that they make in a shape of a Mickey head, and serve with a pitcher full of cinnamon/sugar/butter sauce to pour over them. They are AWESOME, but IMO a little goes a long way (VERY sweet), so I like to share them with someone.
Have fun!