Cheesy Ground Beef Empanadas Recipe

Name: Cheesy Ground Beef Empanadas Recipe
Ingredients: 1 lb ground beef; 1 medium onion, finely chopped; 1/2 bell pepper, finely chopped (optional); 2 cloves garlic, minced; 1 teaspoon ground cumin; 1 teaspoon paprika; 1/2 teaspoon chili powder (optional); 1/2 teaspoon salt, or to taste; 1/4 teaspoon black pepper; 1 cup shredded cheese (cheddar, Monterey Jack, or a blend); 1/4 cup chopped cilantro (optional); 1 tablespoon olive oil (for frying, if not baking); 1 package (10-12) empanada dough discs (store-bought or homemade); 1 egg, beaten (for egg wash, optional)