If you buy Brussels sprouts on the stalk or grow them yourself, don't toss the long leaves that grow from the top of the stalk; they're delicious in their own right.
To remove the tough ribs from the greens, fold each leaf in half along the rib, and either pull the rib away from the greens with your hand or cut it out with a knife. If they are young and tender, add them raw to salads, suggests toodie jane. Otherwise, try steaming or braising them as you would other greens. katierose sautés the greens with onion, garlic, and Fuji apple, and serves them topped with crumbled nuts. scubadoo97 has used the leaves in place of grape leaves when making dolmas, and says they work really well.
Discuss: Brussel Sprout GREENS or LEAVES