5lbsweet potatoes (about 6 large), peeled and chopped
2tspsalt
1tspground coriander
1tspground cumin
1tspsmoked paprika
¼to ½ teaspoon chipotle chili powder
¼cupfresh lime juice (about 2 limes)
In a large heavy-bottomed pot, heat the oil over medium-high heat. When the oil is hot, add the onion and sauté, stirring occasionally, for 6 to 8 minutes, until golden brown and softened. Add the sweet potatoes, salt, coriander, cumin, smoked paprika, and chipotle powder.
Add 6 cups of cool water and bring to a simmer. Simmer for 10 to 12 minutes, until the sweet potatoes are very soft. Puree until smooth, either in batches in a blender or with an immersion blender. Stir in the lime juice and garnish with cilantro.