Preheat oven to 375°F (190°C) and grease a small baking dish.
In a skillet, heat olive oil and sauté chopped onion until translucent.
Add grated zucchini, season with salt, pepper, garlic powder, and paprika. Cook until moisture evaporates.
In a bowl, mix sautéed veggies with vegan cheese, nutritional yeast, breadcrumbs, lentils or tofu, soy sauce, and ketchup.
Transfer mixture to baking dish and flatten evenly.
Bake for 20–25 minutes or until golden and firm.
Let cool for 5 minutes before serving.