Preheat the oven to 325°F (163°C) and line a springform pan with parchment paper.
In a bowl, mix almond flour, melted butter, and granulated erythritol. Press into the pan to form the crust.
Bake for 10 minutes, then let cool.
In a large mixing bowl, beat the cream cheese until smooth.
Add powdered erythritol, eggs, vanilla extract, heavy cream, and lemon juice. Mix until well combined.
Pour the filling over the crust and smooth the top.
Bake for 40-45 minutes, or until the center is set.
Let the cheesecake cool to room temperature, then refrigerate for at least 4 hours before serving.