Regrow Fresh Heads of Romaine Lettuce from Chopped Down Lettuce Hearts

I am gong to have to give this a try:

The next time you chop up a head of romaine lettuce for salad, hang on to the very bottom. The “heart” can be placed in a pan of water and with a little time, will eventually sprout a whole new head of lettuce, ready to harvest, eat, and repeat the process. More »

(from Lifehacker http://lifehacker.com/5992390/regrow-fresh-heads-of-romaine-lettuce-from-chopped-down-lettuce-hearts)