1. Rub steaks with 1/4 cup oil and a generous amount of black pepper. Heat a heavy skillet on a medium flame. When the skillet is very hot, sear steaks for four to five minutes on each side.
2. Heat remaining 1/4 cup oil in a frying pan and saute onions until soft and golden. Add salt. Remove excess oil. Add wine and cook until most of the wine evaporates.
3. Slice meat immediately before serving and top with caramelized onions.