Kale Soup

• 1½ pounds kale, cleaned, stemmed, and roughly chopped (about 6 cups)
• ⅓ cup olive oil</

Working in batches, place the chopped kale in a food processor and process for 3 to 4 minutes, until almost puréed. Move the kale to a large saucepan, add the oil, and cook over medium heat for 45 minutes, until the greens have become soft and dark.

Put the chicken stock and potatoes into another large saucepan over high heat. Bring to a boil, then reduce to simmer and cook until the po