Giant Empanadas

Ingredients (12)

• 1 pound ground beef
• 1 cup chopped onion
• 1 cup chopped green pepper
• 1 can (14-1/2 ounces) diced tomatoes, undrained
• 1 tablespoon chili powder
• 1 tablespoon ground cumin
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 2 unbaked pastry shells (9 inches)
• 1 large egg yolk
• 1 tablespoon water
• Sour cream, chopped fresh tomatoes and/or shredded cheese and lettuce for garnish, optional