Thanks all.
I'll look into a version of egg drop soup.
I found there are many frittatas like spinach, broccoli and mushroom, and asparagus. We tried one last night and it was great. It was like an egg white omelet but finished off in the oven.
We made a banana smoothie this morning with raw egg whites and flax. I was a little nervous about raw but it was pretty good.
I saw a recipe for an egg white souffle with white beans and herbs that we will try.
I know there's got to be more.