Sheet the jib in tight, tack and leave the jibsheet cleated on the wrong side. You want to end up with the mainsail to the port side thereby putting the boat on starboard tack.
As the boat passes through head to wind, the jib, held by the windward sheet, will set aback and push the bow downwind. Hold the mainsheet on the winch with its clutch open.
Now steer the boat back toward the wind and make adjustments with the helm and the mainsheet until the boat is lying at a steady attitude to the wind on a close reaching heading. The wheel should be held turned so it tries to drive the bow to windward. The mainsail should be luffing most of the time.
