Ingredients
Method
- Heat olive oil in a large skillet over medium heat.
- Add the sliced onions and sprinkle with salt.
- Cook the onions, stirring occasionally, for about 15-20 minutes until they are golden brown and sweet.
- Add the chopped kale to the skillet.
- Sprinkle black pepper over the kale and cover for about 5 minutes.
- Add balsamic vinegar and toss everything together thoroughly.
- Taste and adjust seasoning before serving, if necessary.
