2Rinse halibut and pat dry. Brush lightly all over with olive oil and sprinkle with salt and pepper.
3Heat a 10-12 inch nonstick frying pan over medium-high heat. Add fish and cook until browned on the bottom, about 4 minutes. Turn pieces over. Spoon vinegar mixture over browned sides. Lower heat and cook until fish is opaque but still moist-looking in the center (4 to 5 minutes).