I love Tuscan Kale or Lacinato or Dinosaur Kale (how many names can one veg have?!) usually make it agrodolce - adding a little balsamic and sugar at end of cooking. Sometimes with bacon sometimes w/o.
I know about caldo verde...
We just picked up some Red Russian Kale
at one of our last farmer's market.
Just wondering if anyone has any additional ideas or recipes?