Put the sliced liver in a deep dish, then add lemon juice and vinegar
Add garlic, cumin, coriander, salt and bblack epper, then chili and mix well
Bring a large frying pan, then put it on the fire so that it is hot, then put the oil and butter, as the butter gives it a wonderful taste - note that the frying pan should be large until the liver is well cooked
Put the liver in the pan for 5 minutes only
While placing the liver in the pan, cut the bell pepper and hot pepper into slices
Put the pepper on the liver and leave it for another five minutes
Prepare the bread and put the liver inside, preferably by putting some drops of lemon on it