Prepare the Greens

1. Wash and Chop: Wash the collard and mustard greens thoroughly to remove any dirt or grit. Chop them into bite-sized pieces.
2. Sauté the Onions and Garlic: In a large pan, heat the olive oil (or butter) over medium heat. Add the diced onions and cook until they become translucent, about 5 minutes. Add the minced garlic and sauté for an additional 1-2 minutes until fragrant.
3. Add the Greens: Gradually add the chopped greens to the pan, stirring as you go. The greens will wilt as they cook.
4. Season: Add the red pepper flakes (if using), salt, and pepper. Stir to combine.
5. Simmer: Pour in the vegetable broth (or chicken broth) and bring to a simmer. Cover the pan and let the greens cook for 10-15 minutes, stirring occasionally, until they’re tender.
6. Taste and Adjust: Taste the greens and adjust the seasoning if necessary. Add more salt, pepper, or red pepper flakes to suit your preference.