Kitchen 101: Sachet or Bouquet Garni

Gail Anderson wrote:

I have a giblet pan gravy recipe that calls for a sachet. What is that?
Great question Gail!
I posted a video that explains what it is, why you want to use one, and how to make one. Enjoy!

I have recipes that call for oiling both sides of parchment paper. Food doesn’t stick to parchment paper, so why grease it? Is it to keep the paper flat? Thanks.