Best Beef Enchiladas
1 (15 ounce) can black beans, rinsed and drai… 1 (4 ounce) can sliced black olives, drained 1 clove garlic, minced 1 cup shredded Cheddar cheese 1 tablespoon dried parsley 1 tablespoon taco seasoning 1 teaspoon dried oregano 1 ½ teaspoons chili powder 2 pounds ground beef 2 ½ cups enchilada sauce 8 flour tortillas ¼ cup shredded Cheddar cheese ¼ medium onion, finely chopped ½ cup sour cream ½ teaspoon ground black pepper ½ teaspoon salt