Dice sweet potatoes and heat oil in a large skillet, cooking potatoes over medium-high heat until tender (about 10 minutes).
Remove chorizo from casing, crumble into the skillet, and cook with potatoes for 5 minutes until chorizo browns.
Mix sour cream with chopped cilantro and lime juice to make crema.
Warm tortillas and fill with chorizo-potato mixture, top with crema, and serve.
Photo: Anthony Espinosa / Unsplash