Hash Brown Casserole

Name: Hash Brown Casserole
Ingredients: 1 cup onion, finely diced; 8 ounces Cream of Chicken soup (I used campbell's); 1 cup sour cream; 8 tablespoons melted butter; 1 teaspoon salt (more if needed); 26 ounces shredded hash browns (thawed); 1/2 cup shredded mozzarella cheese; 1 cup shredded cheddar cheese (1/2 in casserole, 1/2 on top); 4 pieces bacon, cooked and chopped (I used turkey bacon); 1/2 teaspoon black pepper; 1/2 teaspoon parsley