Put liver cubes in a bowl, and sprinkle them with lemon juice, lemon peel, coriander, cardamom, and 1 teaspoon cumin. Toss to coat liver pieces with the spices. Set aside for 30 minutes.
Heat oil in a big skillet. Add the liver pieces, stirring on high heat until all moisture evaporates and liver start to brown, about 5 minutes. Remove from pan and set aside. Avo