Sweet Potato and Black Bean Empanadas

Name: Sweet Potato and Black Bean Empanadas
Ingredients: * 2 scant cup (9 ounce) all purpose flour; * 3/4 tsp kosher salt; * 1/3 cup canola oil; * 1/4 cup cold water; * 1 tbsp apple cider vinegar; * 1 large egg, lightly beaten; * 1 medium sweet potato; * 1 poblano chile; * 1 1/2 tsp ground cumin; * 1 cup canned low sodium black bean, rinsed and drained; * 5 green onion, white and light green part only, chopped; * 2 tbsp chopped fresh cilantro; * 1 tsp ancho chile powder; * 1/2 tsp kosher salt; * 1 egg, lightly beaten