Heat broiler. Rub the steak with the olive oil and season with the salt and pepper.
Broil the steak until browned, 6 to 7 minutes per side. Remove from broiler, cover with foil, and set aside.
Meanwhile, prepare noodles according to the package directions.
In a small bowl, whisk together the soy sauce, lime juice, sesame oil, ginger, fish sauce, and jalapeño.
In a large bowl, combine the basil, cilantro, cucumber, onion, and bean sprouts and toss well with the dressing. Arrange the noodles on top.
Slice the steak into ¼-inch pieces, cutting against the grain, and place over the noodles. Garnish with additional basil and cilantro, if desired.