Cream the room-temperature cream cheese with a spatula.
Add allulose powder and mix well.
Add Greek yogurt and mix well, then add one egg and combine.
Sift tapioca starch and mix it in.
Line a round pan with parchment paper, pour in the batter, and remove air bubbles.
Preheat the oven to 220°C, bake for 15 minutes, then lower to 200°C and bake for another 15 minutes.