A method for preparing a thermally processed food composition which contains a liquid and particulates and which is initially kettle-cooked, added to a container, and subsequently retorted or ultra high temperature processed, which method comprises the step of adding to the food, prior to or during the initial kettle-cooking, an effective amount of a fill viscosity starch which is a thermally-inhibited, derivatized starch which develops sufficient viscosity during the kettle cooking to uniformly suspend the particulates in the liquid during the addition of the food to the container but which, during the subsequent retorting or ultra high temperature processing, drops in viscosity.