Coming off their huge road win over the Steelers, the Giants went home for a Week 9 NFC East duel against the rival Dallas Cowboys.  In the first quarter, the G-Men drew first blood as QB Eli Manning completed a 13-yard TD pass to TE Kevin Boss and a 5-yard TD pass to WR Steve Smith.  In the second quarter, the Cowboys responded with CB Mike Jenkins returning an interception 23 yards for a touchdown.  New York would end the half with Manning completing an 11-yard TD pass to WR Amani Toomer. In the third quarter, the Giants increased their lead as RB Brandon Jacobs got a 12-yard TD run.  In the fourth quarter, Dallas tried to rally as QB Brooks Bollinger completed an 8-yard TD pass to WR Terrell Owens.  Afterwards, New York pulled away as RB Derrick Ward got a 17-yard TD run.. How many touchdown passes did Eli Manning throw in the first quarter?