Preheat your oven to 300°F (150°C). Lightly grease a small springform pan or ramekin.
In a bowl, combine the almond flour with a tiny pinch of sweetener if desired. Press this mixture evenly into the base of the pan to form a thin crust.
In a blender or food processor, add the nonfat Greek yogurt, egg white, low-fat cottage cheese, vanilla whey protein, vanilla extract, lemon zest, and a small amount of sweetener. Blend until completely smooth.
Pour the creamy mixture over the almond flour crust, smoothing the top with a spatula.
Bake in the preheated oven for about 25 minutes, or until the cheesecake is just set and slightly firm in the center. Avoid overbaking to retain a soft, custardy texture.
Remove from the oven and let cool to room temperature, then refrigerate for at least 2 hours to fully set.
Before serving, top with the mixed berries. Enjoy a refreshing, protein-packed dessert!