How to Make It
Preheat grill to medium-high (about 450°F), or heat a grill pan over medium-high. Rub steak with oil, kosher salt, and black pepper.
Grill steak, turning occasionally, until lightly charred and medium-rare, 8 to 10 minutes. Transfer to a board, and let rest, 5 to 10 minutes.
Slice steak against the grain, and spoon tomato relish over top.