Other short, twisty pastas, such as radiatore, gemelli or rotelle, can be used instead of the rotini.
When you have leftover turkey, remove it from the bone, then cube or shred it. Measure 1 to 2 cups of the turkey into airtight freezer containers; label, date and freeze for 1 to 2 months. When you're ready to cook, pull it out and use as directed in the recipe.
When cooking pasta, you may want to cook a little extra for future use. Measure the amount you will need, and freeze in an airtight freezer container for up to 1 month.
Stir the frozen pasta into soup just before serving.