Cut the stems off of the Brussels sprouts and then chop them into 1/2″ pieces. Often, I just set them on the flat side after cutting off the stem and then just cut a cross in them from top down (cut into fourths, basically). If they are rather large, you might want to cut them more. This recipe would work just fine if they were just halved as well though. It’s up to you what size you want the pieces. 1/2″ makes them perfect for me.