Damon,
The stalks of
broccoli contain many
]vitamins and minerals including calcium.
Steaming chopped broccoli for three to four minutes in a steamer over a pot containing a cup or more of pure water, will provide one with tender, delicious as well as nutritious greens with one's meal!
An excellent steamer for instance comes with this
cook set 
at Simply Natural Foods!
For those with a tighter budget an inexpensive
bamboo steamer will suffice but
get one that fits the diameter of the pots you have in your pantry or cook on top of a seasoned wok!
Thank you, very much.
Bruce Paine