So let her paw and fidget and ignore it. Give her her bucket and go do what you want.
Or correct her when she paws if that is a habit you don't like. Might take a bit for her to actually get it and start eating rather than pawing the first couple of times.
Plenty of horses do paw for a while when first eating, especially when they're new to the concept. If she ties quietly normally (does she?), then tie her and let her eat (or fidget, or stand bored).
Really, I'd go with whatever Fayde wants to be sure, but she can learn to stand tied and eat now as good as ever. Or walk in circles and eat. ;)
None of those things are really a problem in and of themselves- they're not going to hurt the horse. They just irritate humans.