1. Stir together the grapefruit, red onion, ginger and mint in a medium bowl. Add salt and pepper to taste. Set aside.
2. Heat the olive oil in a large skillet over medium-high. Place the steaks on a paper towel and blot each side dry. Sprinkle the top of each with a pinch of salt and black pepper.
3. Place the steaks in the skillet, seasoned-side down. Repeat the seasoning on the other side with a pinch of salt and pepper. Cook for 3 to 4 minutes on each side, until outside is seared and the fish begins to flake, but it is still slightly pink in the center.
4. Arrange the steaks on serving plates and top each with ¼ of the relish.
Recipe courtesy of Wonderful Citrus.