Cheesy Chicken Hash Brown Casserole

Name: Cheesy Chicken Hash Brown Casserole
Ingredients: 30 ounces (1 bag) frozen shredded hash browns (thawed); 1 medium green bell pepper (diced); 1 medium red bell pepper (diced); ½ cup diced onion; 2 cups cubed rotisserie chicken; 8 ounces cheddar cheese (shredded); 16 ounces sour cream; 10 ¾ ounces condensed cream of chicken soup; 1 envelope (1 ounce) ranch dressing mix; ¼ teaspoon black pepper; 30 Ritz crackers (crushed, 1 sleeve or 2 fresh stacks); 1 tablespoon unsalted butter (melted)