Add cottage cheese, Greek yogurt, egg, sugar, flour or cornstarch, vanilla extract, and lemon zest to a high-powered blender.
Blend until completely smooth and creamy.
Pour the cheesecake mixture into the prepared crust or directly into the greased pan.
Bake for 30–35 minutes until the edges are set and lightly golden. The center should still jiggle slightly.
Allow the Cottage Cheese Cheesecake to cool to room temperature.
Refrigerate for several hours or overnight before serving.