Heat 1 tbsp oil in a sauté pan on medium heat. Fry tempeh bacon until caramelized on both sides, about 4 min per side and set aside.
Add remaining oil to pan, sauté onion and kale stems until softened and onion is translucent, about five to seven minutes. Add kale leaves, garlic, salt and chili flakes and saute until kale leaves wilted and glossy.
Toss with chopped tempeh bacon, adjust seasoning if necessary and serve.