Prepare the Zucchini: Grate the zucchini and sprinkle it with salt. Let it sit for 10 minutes, then squeeze out excess moisture.
Mix the Ingredients: In a bowl, combine the grated zucchini, oat flakes, cheese, eggs, and black pepper. Stir until well mixed.
Transfer to a Baking Dish: Grease a small baking dish and spread the mixture evenly.
Bake: Preheat the oven to 375°F (190°C). Bake for 25–30 minutes or until golden brown and firm.
Cool & Serve: Let it cool slightly before slicing. Serve warm as a light meal or side dish.