Avocado Enchiladas

Name: Avocado Enchiladas
Ingredients: 2 dried ancho chiles; 4 cups plus 1 tablespoon vegetable oil; 1/2 medium onion, cut into 1/4-inch dice; 2 cloves garlic, minced; 2 tablespoons dark-brown sugar; 5 tablespoons ground cumin; 2 tablespoons dried oregano; 2 cups dry white wine; 1 can crushed plum tomatoes (28 ounces); 2 cups Homemade Chicken Stock Homemade Chicken Stock, or canned low-sodium chicken broth, skimmed of fat; 8 Hass avocados; 1 cup loosely packed fresh cilantro leaves, roughly chopped; 1/4 cup fresh lime juice; 3/4 teaspoon salt; 1/4 teaspoon freshly ground black pepper; 25 corn tortillas; 1 1/2 pounds Monterey jack cheese, grated