Thanksgiving PotpiesRecipe for Thanksgiving Potpies. I do this every year with the Thanksgiving leftovers. These freeze well and are a big hit. This is what I had left over this year. Any other leftover ingredients can be used. In past years, I have had carrots, corn, sweet potatoes, you name it. Sometimes you need to make some extra gravy, veggies or potatoes to flesh out the potpies if you are lacking in leftovers in one category.