What to do with TPTK here?

[parappa]

10+1

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed)

UTG+2 (t800)
Hero (t800)
MP2 (t800)
MP3 (t800)
CO (t800)
Button (t800)
SB (t800)
BB (t800)
UTG (t800)
UTG+1 (t800)

Preflop: Hero is MP1 with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG calls t15, UTG+1 folds, UTG+2 folds, Hero raises to t60, MP2 folds, MP3 folds, CO calls t60, Button folds, SB folds, BB raises to t90, UTG calls t90, Hero calls t45, CO calls t45.

Flop: (t415) 4[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="blue">(4 players)</font>
BB bets t100, UTG raises to t300, Hero ???