Thaw , steam them until they cook down to a more tender state. Saute some garlic, onions . Here is where I cut them up right in the pot with kitchen scissors or knives. Drain the greens and mix all together in a pot with a few splashes of olive oil.
Salt and add a smidgen of cayenne if you like a little spice.
Top with some parmesian cheese and enjoy a most nutritious dish.