01 - In a medium bowl, combine mashed sweet potatoes, black beans, ground cumin, chili powder, salt, and freshly ground black pepper until evenly mixed.
02 - Spoon a generous portion of the filling along the center of each flour tortilla. Roll each tortilla tightly and place seam side down on a lightly greased baking sheet.
03 - Lightly spray the rolled taquitos with olive oil spray. Bake in a preheated 400°F oven for 20 minutes or until golden and crisp.
04 - In a blender or food processor, combine sour cream, avocado, and lime juice until smooth and creamy.
05 - Serve the warm taquitos with freshly made avocado crema on the side.