Broccoli raab and rapini are not synonymous, but when it comes to recipes and marketing they practically are. Broccoli raab [rob] has long, thin rich-green stems (6-9 inches/18-23 cm long) topped with scattered clusters of broccoli-like florets. The flavor is nutty and both pungent and zesty. Rapini [rah-PEE-nee] is similar to broccoli raab but with…