Preheat & Prepare: Preheat the oven to 180°C (350°F). Grease a baking dish and set aside.
Prepare the Batter: In a large bowl, whisk together the eggs, sour cream, mayonnaise, flour, baking powder, and cornstarch until smooth.
Add Cabbage: Fold the finely sliced cabbage into the batter, ensuring it is well coated.
Bake the Pie: Pour the mixture into the prepared baking dish. Bake for 35-40 minutes, or until golden brown and set.
Cool & Serve: Let the pie cool slightly before slicing. Enjoy warm as a main dish or a side!