I should probably bake longer at lower temperature; had to put some foil over the top at the 45 minute mark because the top was getting pretty browned but the middle hadn't reached 160 yet. I mixed the filling components in 2 batches because my biggest bowl isn't big enough to fit it all at once.
I like the overall recipe, but it was a bit bland. Next time, I'd add more spinach, a bit more salt and pepper, and maybe double the dill.