Add the potato and carrots to a saucepan. Add enough water to cover the vegetables. Bring to boil, stirring occasionally, until the vegetables are tender.
While the celery, onion, and garlic are boiling, heat the butter in a large skillet on medium heat. Cook the celery, onion, and garlic until tender. Stir occasionally. Drain the potatoes from any excess water. Mix the celery mixture with the potatoes.
Mix the celery mixture with the potatoes. Add the chicken soup and water.
Mix in the chicken. Now simmer for a few minutes until it is hot.
Pour the mixture into the crust. Top with crust. After this, Bake at 350°F for 20-30 minutes, or until the crust is golden brown.
For the Crust: Run the pork rinds through a food processor or crush them until they are finely ground. Combine all ingredients in a large bowl. Add the flour, baking powder, sugar, and pepper to the bowl. Add enough water to form a soft dough that can be held together. For the desired consistency, you may need to add flour or more water.
Roll out the dough onto a floured surface. Cut out top and bottom crusts to your desired sizes, depending on the dish.
Lightly grease the dish, then place the dough on it and press the sides together.