Q: Given the background description of some cooking related query, summarize the question into a title
I'm making some saffron rice. After sauteing some onions and saffron and then toasting the rice, it calls for simmering with broth for 8 minutes with a parchment lid. What is the difference between a parchment lid and a top? Is it just the vent for steam? If so, can I just partially cover with a lid? Does the parchment need to be directly resting on the rice for it to "work"?note: I know what a parchment lid is, I just don't fully understand why you'd use one.
A:
What's the purpose of a parchment lid?