Black Bean and Cheese Enchiladas with Ranchero Sauce

Name: Black Bean and Cheese Enchiladas with Ranchero Sauce
Ingredients: 2 dried ancho chiles (stemmed and seeded); 2 cups water; 2 teaspoons olive oil; 1 cup chopped yellow onion; 5 garlic cloves (sliced); 1/4 teaspoon kosher salt; 2 cups organic vegetable broth; 2 tablespoons chopped fresh oregano; 2 tablespoons no-salt-added tomato paste; 1/2 teaspoon ground cumin; 1 tablespoon fresh lime juice; 1/8 teaspoon ground red pepper; 1 15-ounce can black beans, rinsed and drained; 2 cups 8 ounces pre shredded reduced-fat 4-cheese Mexican-blend cheese, divided; 3 thinly sliced green onions (divided); Cooking spray; 12 6-inch corn tortillas; 6 tablespoons light sour cream