Preheat your oven to 375°F (190°C) and grease a medium-sized baking dish with olive oil.

In a large mixing bowl, combine sour cream, mayonnaise, minced garlic, salt, black pepper, and chopped parsley. Mix well.

Thinly slice the zucchini and add it to the creamy mixture. Toss to ensure every slice is well-coated.

Transfer the coated zucchini into the greased baking dish, arranging in a single layer.

Sprinkle shredded mozzarella and grated Parmesan cheese over the zucchini layer.

Bake for 25–30 minutes or until the cheese is bubbly and golden brown, and the zucchini is tender.

Let it cool for a few minutes, garnish with fresh parsley, and serve.