A parchment paper lid forms a semipermeable barrier that allows some evaporation and browning, but not too much.

Most of the parchment paper we home cooks use comes in a roll, so the lid will have a tendency to curl up on itself, which can be a problem if it curls up off the food. To prevent that ...

Parchment paper looks prettier because, when the parcels are fried, you can see the ingredients inside; when I use parchment, I make sure to put the spring onion underneath the chicken before ...