We've doing doing a lot of salads with protein in them- cook up a bunch of chicken breasts at once and slice them to throw in a salad, then leave in fridge until you need them. You can buy it pre-cooked too, but I'm not personally as much a fan of that stuff.
Instant pudding is easy. DH and I made some up the other day and ate almost the whole thing. Between each of us we got the nice flavor from the pudding, and it was also a cup of milk each. You could easily add in some protein powder, or nuts etc for more protein-- and it's fast, and cold.
I'm eating a lot of almonds- especially chocolate covered ones :)
Like people mentioned-- cottage cheese can become a pretty full meal if you add in veggies and stuff.
If you have "super bread" as I like to call it (the one we're eating right now is called "ancient grains", then something like toast with peanut butter can practically become a whole meal.
I'm also enjoying a lot of eggs-- hard boiled, or soft dipped in a good toast. You can add these to salads, on grab and go. And because they cook so fast, I'm still cooking them up quickly, throwing a slice of cheese on top and then making breakfast sandwiches.
MMMMMmmmm. I'm hungry now. I'm having a banana, carrots and cheerios for breakfast. Time to go get something more substantial.