I got this recipe from the crappy CSA Christina and I were a part of.
1 bunch Kale
1/2 onion - chopped
3 TBS apple cider vinegar
1 TBS sugar (preferably in the raw)
1 tsp garlic (fresh or powder whatever you have on hand)
3 TBS water
Saute the onion in olive oil until it starts to soften.
Mix in all other ingredients except for kale and let mix well
Add kale and 3 TBS water
Cover and cook on medium for a few minutes until kale is wilted but not mushy