Preheat your oven to 180°C (350°F).

In a mixing bowl, combine the cream and Parmesan cheese. Beat with a mixer until smooth.

Add chopped spring onions and minced garlic to the mixture.

Slice the zucchinis and potatoes into rounds.

Season the zucchini and potatoes with salt, black pepper, and oregano.

Mix the seasoned vegetables with the cream and Parmesan mixture, ensuring they are well coated.

Let the mixture sit for about 10 minutes to marinate.

Grease a baking dish with sunflower oil and transfer the vegetable mixture into the dish.

Bake in the preheated oven for 50 minutes or until the vegetables are tender and golden brown.