Remove the steak and transfer the marinade to a saucepan on the grill and bring to a low simmer. Sear the steak on the grill until nicely caramelized, basting with the marinade, about 3 minutes per side. Lower the heat to medium. Continue cooking until the steak reaches an internal temperature of 125 degrees F. Let the steak rest for 5 minutes.
For the green onions: While the steak is cooking, brush the onions with the oil and grill, basting with the steak marinade, until slightly charred.
Wine Pairing Selection: Beringer Founders' Estate Riesling