Hi,
Pumpkin pie is very popular dessert in US, especially during Christmas.
3 years ago when I was in USA for holiday, we were invited to a friend's home for Christmas dinner. They served sweet potato pie. According to them, you will not go back to pumpkin pie if you have ever tried sweet potato pie. It was good and I had TWO slivers.
It's quite easy to make pumpkin or sweet potato pie. You will get a lot of recipes after googling.
PS: In NZ, we call sweet potato Kumera. A lot of people say kumera is not sweet potato. They are wrong. They are the same thing - they have the same scientific names according to a kumera farmer! Kumera in NZ maybe sweeter is because of the climate, soil or something like that.
Cheers
Barry