Mix together the pesto, vinegar and water
Allow steak to sit at room temperature for 30-40 minutes before grilling
Sprinkle both sides of meat with kosher salt
Grill to desired temperature
A few minutes before it is done brush both sides with pesto.
Remove from grill and allow to sit at room temperature for 5 minutes or so
Brush top with a nice layer of pesto
Slice and enjoy!