This procedure can be used for the leaves and stems of a cauliflower; broccolli stalks; the hard part at the bottom of a cabbage or anything else you don't want to use as it is
Set up your food processor with a small shredding blade
Turn the food processor on, and using the part provided to push ingredients on to the shredding blade, push each stem etc through the shredder
You will get a bowl of shredded vegetable that can be used as it is in slaw, with French dressing or mayonnaise, steamed as a hot vegetable, used in soups, casseroles etc
Do make sure to bag or box securely as the shredded veg are rather pungent!
Video
Notes
I priced this as half the cost of a whole cauliflower, although if you have been throwing the leaves away, it could be argued that it's free!