Boil the pasta with salty water following the instructions on the package, drain. Place in the oven proof dish.
Meanwhile, cook the ground beef with onion. Add all the ingredients except parsley. Cook on low heat for about 10 minutes. Add the parsley, toss it with the pasta. Place the mixture into the casserole dish. Mix the egg with mozzarella and spread all over the pasta equally.
Preheat the oven to 400 F (200 C) and bake until the top takes a golden colour. Serve it with Ayran and Tomato Salad.