Place the sweet potatoes in a large pot, cover with water and bring to a boil over medium-high heat.

Reduce the heat and cook for 15 to 20 minutes, or until the sweet potatoes are fork-tender.

Pour the sweet potatoes into a colander to drain.

Place the sweet potatoes in a large bowl and add the coconut milk, chicken stock, chipotle peppers and ghee, if desired. With a potato masher, hand mixer or immersion blender, mash the sweet potatoes. You could also process in a food processor. If you prefer your mashed sweet potatoes a bit thinner, simply add more coconut milk or chicken stock.