In a large mixing bowl, combine the cream of chicken soup, sour cream, and milk. Stir until smooth. Then, add the shredded chicken, pepper, and Italian seasoning. Mix well until all the ingredients are thoroughly combined.
Transfer the chicken mixture to a skillet over medium heat. Stir occasionally until the mixture is heated through and bubbly, about 5-7 minutes.
While the chicken mixture is heating, cook your rice according to the package instructions or in a rice cooker.
Prepare your toppings by placing them in small bowls. Arrange mandarin oranges, sliced olives, pineapple tidbits, green onions, shredded cheese, diced tomatoes, and chow mein noodles on your serving platter.
To serve, scoop a generous portion of rice onto a plate. Top it with the creamy chicken mixture, then let everyone customize their haystack with their choice of toppings.
