In 12-inch nonstick skillet, heat remaining 1 tablespoon oil over medium-high heat. Stir in poblano chiles, onion, oregano, chipotle powder, remaining 1/4 teaspoon salt and 1/4 teaspoon pepper to combine. Cook 5 to 7 minutes, stirring frequently, until vegetables are just tender. Add roasted sweet potatoes and black beans. Continue cooking 3 to 4 minutes, stirring frequently, until mixture is heated through.