Wash the sweet potatoes thoroughly, peel, boil, and mash them.
Mix cream cheese, sugar, eggs, and heavy cream well with the mashed sweet potatoes.
Strain the batter through a sieve to make it smooth.
Line an oven pan with parchment paper and pour in the batter.
Bake in a 200°C oven for 35~40 minutes.
Let it cool completely, then cut into pieces for serving.