I found a trick! When cooking broccoli sometimes it smells like old flatulence... especially when your broccoli is not super fresh. Last night I had the idea to put garlic salt in the water when boiling it... and Voila! Yummy smelling broccoli for dinner! I probably used 1/2 a tsp of garlic salt in the water. Not enough to flavor the broccoli, but enough to make it aromatically pleasing.