1Wash the collard greens thoroughly and remove the stems. Chop the leaves into bite-sized pieces.
Heat the olive oil in a large pot over medium heat.
Add the chopped onion and cook until it becomes translucent, about 5 minutes.
Mince the garlic and add it to the pot, cooking for another 1-2 minutes until fragrant.
Add the chopped collard greens to the pot and stir to combine with the onion and garlic.
Pour in the chicken broth and add the red pepper flakes. Stir well.
Bring the mixture to a simmer, then reduce the heat to low. Cover the pot and let it cook for about 45 minutes to 1 hour, or until the collard greens are tender.
Season with salt to taste before serving.