We like Bruno's pizza a lot---wish we had one here, in fact. Their Greek salad is enough for two, easily and quite tasty. All the pizzas are good. They also deliver, but sometimes hours are limited during off-season.
D&K Cafe at Grayton will sell their gumbo, which is the best seafood gumbo that I've ever had. I have schlepped over there with a big kitchen pot a few times when we were expecting company. Call ahead and Doug will tell you if they have enough to spare. (They don't take credit cards or out-of-town checks, though.)
We are also guilty of buying a bucket of KFC fried chicken (none of their side dish action) and loading it onto a pretty platter at the house. Coupled with corn on the cob, watermelon slices, and a couple of salads from Publix or Modica, it makes a fine and easy meal. There is a KFC in Freeport, if you're traveling on Hwy. 331, and several along U.S. 98 in South Walton.