When I am deeply depressed or anxious, I cannot swallow food. I would get hungry but still be unable to make food get inside my GI tract. And then it would make me even more anxious because I would think that the hunger pangs would be overwhelming (they are).

What helped me a little bit was drinking nutritional liquids, milk and plain kefir.

During the last big depression, I also found that at some point I was able to stomach sliced Granny Smith apples with Skippy crunchy peanut butter. That actually even felt tasty for me. Since then, it has become a favorite food of mine but I only allow myself an occasional indulgence since I believe Skippy has hydrogenated oils (and I simply detest natural peanut butter; I need my Skippy brand).

I suggest you try apples with PB because you will get a good liquid content from it, some protein, a good amount of fat and some fiber. Not so bad considering you are trying your best to get nutrition inside your body.

A q: do you like cheese? Would mozzarella part skim cheese sticks be an option for you?