I seem to recall that you could order a complete dinner with all the trimmings from Publix, and there is a Publix nearby.
In addition, there are lots of dining options in the area - they have a book at the front desk. I can't recall anything specifically like what you are looking for, but there must be something like that in the area.
Also, they have casual sit-down dining at the resort at Shutters - the buffet price you got was probably for Sonya's, and that is usually a little upscale. Shutters is much more reasonable in price (well, it's typicaly Disney pricing for food).