- 1 tablespoon vegetable oil plus more for grill
- 1/2 cup (1 stick) unsalted butter, room temperature
- 1 teaspoon coarsely ground black pepper plus more
- 1/2 teaspoon kosher salt plus more
- 1 1/2 pounds hanger, flank, or skirt steak
- 1 bunch radishes with greens, halved
- Flaky sea salt (such as Maldon)
- Lemon wedges (for serving)
- Prepare grill for medium-high heat; lightly oil grill grate. Mix butter, 1 teaspoon pepper, and 1/2 teaspoon kosher salt in a small bowl; set aside.
- Season steak with kosher salt and pepper. Grill, turning occasionally, 7-10 minutes for medium-rare. Let rest 5 minutes, then top with pepper butter.
- Meanwhile, combine radishes and remaining 1 tablespoon oil in a medium bowl; season with kosher salt and pepper and toss to coat. Grill radishes until crisp tender, about 2 minutes per side.
- Season steak with sea salt, slice, and serve with radishes and lemon wedges.