Chop rhe onions into quarter rings, also lamb's liver, potatoes and tomatos into 2cm cubes separately.
Fry the potatoes until completely fried. In another pan fry the onions till golden. Add liver and cook in high heat while stirring. Liver cooks relatively fast so be careful. After there is no water in the mix, add tomatos and stirr a bit.
Add lime juice, salt and pepper. Taste the mix until it's your desired sour. When tomatos are starting to melt, add the fried potatoes and mix a bit.
Serve with fresh Lavash bread and lime. Enjoy