Preheat your oven to 190C/ 375F degrees. Grease a 9-inch springform pan with butter or line the bottom with parchment paper.
In a mixing bowl, combine the almond flour, melted butter and monk fruit for the crust. Stir until the mixture becomes crumbly and well combined.
Press the crust mixture into the bottom of the prepared springform pan, ensuring it is evenly distributed. Use the back of a spoon or your fingertips to press it firmly.
Place the tin in the fridge to chill whilst you prepare the cheesecake filling.
In a large mixing bowl, add the cottage cheese, sour cream, vanilla, lemon juice, eggs and allulose. Whisk until smooth and combined.
Alternatively, use a blender or food processor and blend until smooth and creamy, ensuring there are no lumps.
Pour the filling over the cooled crust in the springform pan. Smooth out the top with a spatula to ensure an even surface.
Bake the cheesecake in the preheated oven for approximately 40-45 minutes, or until the edges are set, and the center is slightly jiggly. Turn off the oven and leave the cheesecake inside with the door slightly ajar for about an hour.
Remove the cheesecake from the oven and allow it to cool completely. Once cooled, cover the pan with plastic wrap and refrigerate for at least 4 hours, or preferably overnight, to set.
When ready to serve, carefully remove the sides of the springform pan. Add toppings if you wish. Slice the cheesecake into individual servings and enjoy!