My favorite breakfast at Disney World is the Banana-Stuffed French Toast. You can get it at Port Orleans Riverside in Boatwright's served with strawberry-banana sauce.
You can also get the same thing, only it's called Tonga Toast, at both Kona Cafe and Capt. Cook's counter service at the Polynesian, and at the Rainforest Cafe at the Animal Kingdom. Tonga Toast is served with pancake syrup.