This is my standby way of preparing kale....
1 bunch kale
2 tbsp olive oil
1/2 onion, sliced into crescents
1 tbsp tamiri or soy sauce
2 tbsp water
What you do:
Wash kale by submerging leaves in a bowl of cold water. Dry, and tear kale leaves away from stems and into pieces.
Heat olive in pan over medium heat. Add onions and saute a few minutes, until translucent. Add kale and stir to coat with oil. The kale will turn a brilliant bright green and begin to wilt. Mix together the tamiri (or soy) and water. When greens begin to wilt, add liquid and allow the leaves absorb it, about 5-8 minutes. Taste to see if they're done - greens should not be bitter, but a little sweet and still green.