Banana Black Bean Empanadas

Name: Banana-Black Bean Empanadas
Ingredients: 2 tablespoons vegetable oil; 1 firm medium-sized banana, diced; 3 /4 cup chopped onion; 1 15-ounce can black beans, drained; 1 /4 cup chopped fresh cilantro; 3 /4 teaspoon ground cumin; 1 /4 teaspoon cayenne pepper; 1 17.3-ounce package frozen puff pastry (2 sheets), thawed; 1 cup (packed) coarsely grated Monterey Jack cheese; 1 egg, beaten to blend (for glaze)