Ground Beef Empanada Pie

Name: Ground Beef Empanada Pie
Ingredients: 1 pound ground beef; 1 medium white onion (diced); 3 cloves garlic; 2 tablespoons tomato paste; 1 cup diced tomatoes; 1 cup canned black beans (drained); 2 large bell peppers (diced); 1 ½ cups corn; 2 cups shredded cheddar cheese; ¼ cup fresh cilantro (chopped); 1 tablespoon canola oil; 2 tablespoons chili powder; 1 ½ teaspoons salt; 1 teaspoon cumin; 1 teaspoon ground coriander; 1 teaspoon dried oregano; ¼ teaspoon cayenne pepper powder (optional); 1 small jalapeno (diced, optional); 2.5 cups flour; 12 tablespoons butter (cold); ½ cup chicken stock; 1 large egg (separated); 1 teaspoon salt; ½ teaspoon black pepper; 1 teaspoon garlic powder