If you’d rather use fresh broccoli, use your hands and a small, sharp knife to separate a head into florets. (Florets are the little “trees” all over the top of the broccoli.) Cut any large florets in half. Trim off the ends and tough peel from the thick stem, then cut it into small pieces. You’ll end up with about 5 cups of florets and chopped stem, and you’ll need to boil it in step 2 until it’s just tender, around 5 minutes.