Great suggestions so far ...
Breakfast in Epcot - Sunshine Seasons breakfast platter is definitely shareable (and good), just did it a couple of weeks ago. Eggs, bacon, sausage, potatoes, french toast bread pudding. If you don't like something ask them to sub it - I don't eat sausage, so they obliged my request of more bacon instead.
Breakfast at BOG - we shared a Gaston's feast and a child's french toast among 4 adults and it was enough food when you included the plate of pastries - I will say we were not looking for a filling breakfast - we knew we would need a snack in a couple of hours
Lunch at BOG - my adult daughter and I share the warm turkey sandwich - it is too much food for just one person. We did add a side order of pomme frites so we would not be fighting over the ones that are included with the sandwich. I would pay for those out-of-pocket and not use a snack credit - they are only a little more than $2.00
MK Casey's Corner - the hot dogs are gigantic!!