As I had feta cheese on hand from one of the zucchini recipes last week, I used it as my cheese. I also substituted egg whites for one of the three eggs. The result was similar to my Mom's german pancake, but thicker and with a richer flavor. It reheats perfectly, although I liked it so much that there wasn't too much to reheat. The nice thing is it doesn't collect condensation on top like so many other breakfast dishes I have made...
I'm definitely going to make this again. It provides a nice break from my muffins and breads. I think eggs are technically a healthier breakfast anyway.