It seems tonight she decided that her dinner wasn't to her liking, but when DH got home from work and had his dinner (exactly the same food as DD's dinner) she had to share with him and ate probably 3 times as much as she ate from her own plate.

Maybe for the time being I need to create one big plate at dinner time for everyone to share from and she just might eat more food that way. I just need to get more food into her.