Fry the beef in olive oil, add salt, pepper, paprika and spices for Giros. Slightly cool the stuffing and place in salad bowl. Dice tomatoes, onion - rings, chop pepperoni, olives rings, feta cheese - cubes. Put all the layers in the stuffing. Mix cottage cheese with yogurt, add the garlic, passed through the press and spices for tzatziki. Peel cucumber, grate, squeeze out and mix with the sauce. Put the sauce over the salad and remove for 6 hours in the refrigerator.