Just like any other greens. Of course, it doesn’t give much flavor but adds bulk and texture to soups and casseroles. Just wilt it down and freeze it in maybe cup or so sized portions to dump into a dish at a later date. Hey, it beats throwing it out or letting it bolt when you’re tired of so much.
LOL!
I just threw a cup of shredded iceberg(leftover from taco night)into the borscht I made yesterday because I couldn’t bear to throw it out.