Neither of my kiddos (2 and 5yo) like raw greens, lettuce or otherwise. They'll eat a piece or two of the crunchy spine of a piece of romaine lettuce, but that's about it.
I have started putting spinach into smoothies, though, and they love it. And pesto pasta is the oldest's favorite meal. Other green herbs will have to be introduced slowly. They aren't that into them (though they like to try them, they spit them out).
I keep hoping that growing lots of veggies and herbs will at least introduce them to these foods, and they will eventually start to eat them. It remains to be seen. (Though they do love the strawberries, peas, and beans; they aren't as into the other herbs, tomatoes, and greens.)