
½ cup salted butter, softened
2 tablespoons white miso paste
1 small shallot, cut up
¼ cup tightly packed fresh tarragon
¼ cup tightly packed Italian parsley
¼ teaspoon cracked black pepper
1 (2- to 2½-pound) beef flank steak, about 1 inch thick
3 tablespoons olive oil
2 tablespoons seasoned rice vinegar
2 teaspoons pure sesame oil
2 teaspoons gochujang paste
3 cloves garlic, grated
1 (1-inch) piece gingerroot, peeled and grated
6 baby bok choy, trimmed and halved lengthwise
12 to 14 small red radishes, trimmed and halved lengthwise
2 tablespoons olive oil
½ teaspoon coarse kosher salt
½ teaspoon cracked black pepper