In a skillet, cook the sausage until browned. Drain well. In a large mixing bowl, combine the cheese, chicken soup, sour cream, French onion dip, chopped onion, bell peppers, salt and pepper. Fold in thawed hash brown potatoes. Mix well. Spread ½ of the hash brown mixture over bottom of a 9 X 13-inch greased baking dish. Spread ½ of the browned sausage over hash browns. Repeat layering second ½ of hash brown mixture. Top with remaining sausage. Bake at 350°F for about one hour or until casserole is golden brown.