Preheat the Oven: Set the oven to 180°C (350°F) and grease a baking dish with olive oil.
Prepare the Vegetables: In a large mixing bowl, combine the chopped cabbage, grated carrots, and diced onion.
Make the Batter: In another bowl, whisk the eggs, then mix in the black pepper, oregano, salt, and flour. Stir well.
Combine Everything: Pour the egg mixture over the vegetables, add shredded cheese, and mix until evenly coated.
Transfer to Baking Dish: Spread the mixture evenly in the greased baking dish and sprinkle sesame seeds on top.
Bake Until Golden: Bake for 30-35 minutes, or until the top is golden brown and the bake is firm to the touch.
Serve & Enjoy: Let cool for a few minutes before slicing. Serve warm as a main dish or a side.