In a large sauce pot, bring the chicken broth and the coconut milk to a low boil. Add the chicken and return to low boil.
Taste, then correct seasonings with salt and pepper or seasoning salt. Continue at a low boil. (If using a hot chile for spicy heat, add it now. If some guests would prefer it without the heat, the chile could be served as a topping.)
Mix together the water and corn starch until smooth. Add slowly to hot chicken broth mixture while stirring constantly. Continue to cook and stir until gravy has thickened. If you prefer a thicker gravy, allow the gravy to cook at a low boil until reduced to desired thickness. Alternately, a little more cornstarch dissolved in a little water may be used for additional thickening.
Just prior to serving, stir in the basil and cilantro.
To assemble haystack: layer the Chinese crispy noodles, cooked rice, and gravy. Add any or all toppings in order of preference.