1. In a large frying pan, heat three tablespoons oil over medium heat.
2. Season the fish on both sides with one teaspoon salt. Place fish in the hot pan and sear undisturbed until nicely browned, about three to four minutes. Turn the fish over and sear an additional three to four minutes. Remove fish from pan and set aside.
3. Add remaining one tablespoon oil to the pan. Add leek, lemon, and chili, and cook until soft, about eight to 10 minutes. Season with remaining salt. Add wine and cook for an additional five minutes. Place the fish back into the pan and cook covered for five to eight minutes.
4. Garnish with dill and serve warm or at room temperature.