The cheap and easy way, but not the best. But given only two plants, I don't think bubble bags will work. Will it? would love to know for myself since I only grow 3-4 plants at a time.
But I made some by throwing some in a large mason jar with a couple quarters. I put a mesh bag over the top tightly and screwed the lid on (i used a bag normally for homebrewing but panty hose would work). Shake vigorously upside down over a piece of glass. When you start to green matter come out, it is done.
Scrape into a pile and put into a parchment paper bindle. wrap that in some damp newspaper and iron it on low heat for a minute or two. Voila. Lots of videos on you tube showing this technique. And you can still use it for butter when done.