Soak the buns. Peel and finely chop the onion. Mix minced meat, squeezed out roll, egg and onion. Season to taste with salt, pepper and coriander. Form into small balls and fry in 2 tablespoons of hot oil, turning for about 8 minutes.
Wash the cucumbers and cut into wide strips with a peeler. Peel the garlic and press it through a garlic press. Heat 1 tablespoon of olive oil. Fry the garlic and cucumber strips in it.
Season with salt and pepper. Deglaze with broth, bring to the boil briefly. Mix yoghurt, lemon juice and remaining oil, salt a little. Arrange cucumber vegetables, meatballs and yoghurt dip in portions. Serve garnished with pepperoni, olives and parsley.