Batter...I don't make my own, I buy the boxed mix where all you have to do is add water. I know, sacrilegious.
Filling..we used potatoes, ham, creme fraiche and cheese.
It took me years to figure out how to do it with out ripping the crepe, I am now a master.
Round 1 out of 4 completed...good thing we are active with the way we eat.