Prepare the Oven and Dish: Preheat your oven to 375°F (190°C).

Grease a baking dish with olive oil to prevent sticking.

Prepare Vegetables: Wash and slice the zucchinis into rounds, set aside.

Peel and thinly slice the potatoes, then arrange them in a single layer in the greased baking dish.

Season Potatoes: Drizzle EVOO over the sliced potatoes.

Season with salt to enhance their flavor.

Mix Filling: In a bowl, combine the finely chopped onion, shredded Mozzarella, chopped parsley, black pepper, and breadcrumbs. This mixture will add depth and texture to the bake.

Layer the Bake: Place the sliced zucchinis over the potatoes in the dish.

Spread the onion-cheese mixture evenly over the zucchinis.

Add Cheese Topping: Sprinkle grated Parmesan or Cheddar cheese on top for a cheesy crust that will become beautifully golden.

Bake: Bake in the preheated oven for about 25-30 minutes. The dish is ready when the zucchinis are tender and the cheese is melted and golden brown.

Cool and Serve: Remove from the oven and let it cool slightly for easier serving.