Inside of Disneyland I would say:
Cafe Orleans - Reservations, often same day available.
Blue Bayou - Reservations, not sure how far in advance you need them this time of year.
French Market (I like it because it is convenient) - I had a great chicken caesar salad there last time I went, and you can often catch some Jazz music being played. It is cafeteria style and I had an unbelievably good coffin cake during the yearly Haunted Mansion Holiday promotion.
Harbor Galley (Near where the Mark Twain is being refurbed, across the path from the Haunted Mansion/Splash). They've got chili in a bread bowl, salads, and some snack items.
Dole Whip (at the Tiki Room)
Hit and Miss Restaurants
Jolly Holiday. Overall, the food is expensive for the quality, and oilly and soggy is how I'd describe the grilled cheese and roast beef. I do like their turkey sandwich which is "good" to "OK", yet something tells me Earl of Sandwich is a better. Oily potato chips, yet the baked items are good and you could split one with your DH. The view is great as it is of the hub/castle. If you want just some soup and a drink, this is the place, and I do like their salad though I think it could be bigger.
El Zocalo. in Frontierland near Big Thunder. Last meal I had here wasn't so good, others have been better, so I woud say it is hit or miss, yet one of the few places you can get Tex-Mex food in the park. Better tacos can be found in downtown Disney. Haven't eaten here in over a year.
Hungry Bear: Yes, it is a burger joint, but the view is nice and it is a pleasant place to sit and watch the ducks and they do have Big Al's Salad Chicken Salad (the red things are watermelon).