Kale was a fabulous food a while back. I went out and got some for my homemade chicken veggie soup last week. I used half the bunch in the soup. It was wonderful! You do have to wash it many many times to get the grit out, but I've found that by shredding it before I wash it helps.
Last night boobalah made osso bucco. I made some kale to have with it. We both agreed that it is a must have for some of our greens from now on. He never has cared for greens and I love just about all of them. Collards are the only ones I don't like. I substituted beet greens for my turnip greens on New Year's day. (It's a Southern thing).
But kale! You do have to cook it a while and Mandalinn is right, in broth is much better than water. Use some homemade broth, thin slice some garlic and S&P and you are on your way.