Since sweet potatoes have been traditionally cheap to buy and easy to grow, they became a mainstay in the Southern diet back in the Civil War days. They are not as popular today but baked sweet potatoes are often served on holidays and sweet potato pie is still a favorite anytime.
Here's a tip about this recipe: if you like pumpkin pie, just substitute a 15 oz can of pumpkin pie filling for the sweet potatoes and you have a pumpkin pie. All the other ingredients and procedures are exactly the same.
If you prefer not to use prepared (canned) filling, you can cook your own sweet potatoes very easily. Just boil about 4-5 large sweet potatoes (enough for 1 3/4 cups of filling) in plain water until a fork pushed into the potatoes enters easily. Then scrape out the inside of the potatoes from the peeling and process in a food processor until you obtain a paste consistency. (You can do this with a fork if you do not have a processor).