Fill a large soup pot with enough water to cover the chopped sweet potatoes by several inches (about 8 cups) and a couple pinches of salt. Alternately, you may steam the sweet potatoes. Bring the water to a boil then carefullyb add the sweet potatoes.

Cook the potatoes in the boiling water until they soften, approximately 15-20 minutes, you should be able to easily slide a fork into and out of a large piece of potato. Remove smaller pieces first if needed. Once cooked, drain the potatoes through a sieve and discard the water.

Place the softened potatoes in a large mixing bowl. Use a fork to mash the potatoes with the butter, minced chili and adobo sauce. Then continue mashing or use an electric beater to whip the yogurt and salt into the potatoes until everything is smooth and creamy. Add additional salt as desired.