Shapeshifter Loki Escapes & Loki recs

[isoldam.livejournal.com]

I'm looking for a story I read some time ago. This is the only scene I can remember from it. Loki is a prisoner on Asgard and has been sentenced to (execution?). Loki escapes by turning into an insect (fly?) and hiding on Frigga's (shoe?). I think Frigga knew Loki was there and was helping him escape. Does anyone remember a story with a scene like this in it?

I've been on a Loki kick recently, so I'd also love to have any recs for your favorite stories where Loki is the protagonist and is not a total bad guy. Thanks so much!