5 tablespoons olive oil
1 pound ground beef
1 teaspoon ground paprika
1 teaspoon ground cumin
1 teaspoon salt
1 teaspoon ground black pepper
4 potatoes, peeled and cut into 1/2-inch cubes
1 (6.5 ounce) can tomato sauce
1 tablespoon chopped summer savory (chubritsa)
1 egg, lightly beaten
2/3 cup yogurt