Commonly used in Turkey, Aleppo pepper is a robust spice that actually comes from the Aleppo region in Syria. It has a smoky, lemony flavor with a moderate heat level. It is often found in a crushed, flaky form and can be used in place of ordinary dried and crushed red chilies.
Cubed chicken breasts (or thighs) are marinated overnight in a combination of thick yogurt, lemon juice, garlic, tomato paste, red wine vinegar and Aleppo pepper.
Grilled to perfection, these delicious chicken kebabs are fantastic served with some Sangak (or nan-e sangak). This is a thin, rectangular or triangular, Iranian flatbread that is about two feet long. It is commonly sold in Persian markets. If you cannot find this type of bread, you can substitute pita bread or naan bread.
Here is the full text recipe for Turkish Kebabs.