Ingredients

• 2 pounds sweet potatoes, washed but not peeled
  
• 2 apples, cut from the core but not peeled
  
• ¹/₄ cup cornstarch
  
• ¹/₄ cup (2 ounces) unsalted butter (or substitute neutral oil)
  
• Salt and freshly ground black pepper
  
• 5 sprigs dill, roughly chopped
  
• 4 ounces baby kale, spinach, or arugula
  
• Extra-virgin olive oil
  
• Freshly squeezed lemon juice or vinegar
  
• 4 ounces sour cream