Definitely Sunshine Seasons in the Land building (right next to Soarin') for both breakfast and lunch. It has several food stations:
The Soup and Salad station (awesome seared tuna noodle salad!)
The Asian Noodle station
The Grill station (grilled salmon!)
Sandwich station
For breakfast, Sunshine Seasons has the standard platter with eggs, bacon, sausage and a biscuit, along with oatmeal and pastries.
An awesome array of desserts...try the Strawberry Shortcake, Key Lime pie or chocolate mousse cake! YUM!
In the World Showcase area there are several good quick service restaurants including La Cantina de San Angel in Mexico; Boulangerie Patisserie in France (cheese plate or ham and cheese croissant); and Kringla Bakeri og Kafe in Norway.
Hope this helps!