Preheat the oven to 425F. Cream together the cream cheese and sugar until light and fluffy. Add in 3 eggs and mix together
Add in the black sesame walnut butter and black sesame powder and mix. Pour in the heavy cream, sift in the cornstarch, and mix until well-combined
Pour the mixture into a 6-inch cake pan lined with parchment paper. Top with the walnut pieces before baking for 25-30 minutes. Remove from the oven and let it cool to room temp. Chill overnight before serving.