How long do you grill a 2 lb flank steak?

This flank steak recipe calls for marinating the steak
and then grilling it.
Marinade
Mix together:
1/2 cup dry white wine
1/2 cup olive oil (or vegetable oil)
2 tbsps lemon juice
1 tsp salt
1 large onion, grated
1 tsp freshly ground pepper
This flank steak recipe calls for 2 pounds of 1 inch thick flank steak. Place the steak in a receptacle just [...]