1 1/2 lbs kale, stems and leaves coarsely chopped
2 tablespoons olive oil
crushed red pepper flakes, to taste (optional)
2 garlic cloves, finely sliced
1/2 cup vegetable stock or 1/2 cup water
salt and pepper
2 tablespoons balsamic vinegar

Heat olive oil in a large saucepan over medium-high heat.

Add crushed red pepper flakes, if using, and let them sizzle a bit in the oil.

Add the garlic and cook until soft, but not colored.

Raise heat to high, add the stock and kale and toss to combine.

Cover and cook for 5 minutes.

Remove cover and continue to cook, stirring until all (most) the liquid has evaporated. I like the kale to still remain bright-ish green.

Season with salt and pepper to taste and add vinegar.