make the crust
In a bowl, combine the crust ingredients, then transfer the mixture to a square baking dish. Press down firmly. Bake and cool the crust.
make the filling
Combine the cheeses, sweetener, vanilla, and lemon juice in a blender until smooth. Add the eggs, then blend until well incorporated. Pulse in the lemon zest.
bake
Pour the ricotta cheesecake filling onto the crust. Bake at 225°F for 1 hour and 45 minutes.
serve
Chill completely, then cut into squares. Serve with a homemade berry sauce and fresh berries (optional).