I don't actually have anything to add as far as how to do it, but reading your post sure did make me crave
Bánh cuốn.
I remember having breakfast at a tiny shop in
Than Uyên, Vietnam sitting on those ubiquitous little plastic stools, eating some variation of Pho and plates of fresh Bánh cuốn (the only two things the place served). There was a woman sitting by the entrance of the shop who made the fresh rice noodle sheets by ladling the batter on to what looked like a fabric sheet stretched across a large-diameter pot of boiling water. Once the noodle set, she'd pick it up with a long chopstick and fold it up with wood ear mushrooms inside and fried shallots on top. Dipped in a little chili/fish sauce mix and in to my mouth within a couple of minutes of being made. Yum.
Out of curiosity, I just looked online and found a
YouTube video of someone making the fresh rice noodle sheets for Bánh cuốn.
-Dan