Boil sweet potatoes until tender (about 20 minutes)
Preheat oven to 350°F.
Add butter and marshmallows to sweet potatoes and beat until melted and well combined.
Add sugar, nutmeg, and salt, mix well.
Add the eggs and beat until well mixed and creamy.
Line a 9” pie dish with the refrigerated pie crust then take the sweet potato mixture and fill the pie crust.
Bake until the pie rises, browns, and firms up. This is usually about 35-40 minutes. If needed, use a pie crust shield if it looks like the crust is browning too fast.
Allow the pie to cool completely. Beat the heavy cream, powdered sugar, and vanilla until stiff peaks are formed. Use this as a topping for your sweet potato pie (if desired)