Steam the sweet potatoes until quite tender, about 10 to 12 minutes.
Preheat your oven to 400ºF.
In a small bowl, stir together the beans, 1 teaspoon lime juice, and ⅛ teaspoon salt.
In another small bowl, whisk together the remaining ½ teaspoon salt, chili powder, cumin, paprika, and black pepper.
Put the cooked sweet potatoes in a medium bowl. Add the spice mix, remaining 1 teaspoon lime juice, and green chiles. Mash the potatoes and seasonings together with a fork or potato masher until relatively mashed but a bit chunky. Stir in the beans.
Dampen 2 paper towels, and place 4 tortillas between them. Microwave the tortillas for 30 to 60 seconds, or until warm and pliable.
Brush or spray one side of a tortilla with oil. Flip and spoon about 3 tablespoons of the sweet potato mixture across the bottom quarter of the tortilla. Roll it up as tightly as possible, place on a baking sheet, and put a water-soaked toothpick through the center to help hold it closed. Repeat with the remaining 3 warmed tortillas.
Repeat steps 6 and 7 with the remaining 4 tortillas.
Bake for 15 to 20 minutes, or until the tortillas are crisp.
Serve with guacamole, salsa, hot sauce, and/or dairy-free sour cream for dipping.
Store leftovers in an airtight container in the refrigerator for up to 2 days.