Yes, kale is this easy to grow! http://toads.wordpress.com/2011/07/17/food-in-the-lawn/
From spilled seeds - I love it! There is another photo on the blog showing this kale plant later in the season, where it is has been mowed around.
A friend sent me this blog because there is a recipe for garlic cookies on it !! Yes, I am going to try them, maybe even a batch with finely chopped kale plus garlic. Hey, it's just for fun!
Where kale grows in lawns, and not just for decoration,
Diana Dyer, MS, RD