Standard line against LAGgy player? 100NL live

[Chizoad]

I'm pretty new to NL (longtime limit player) so this probably falls under typical play.

I'm in early position with A[img]/images/graemlins/club.gif[/img]K[img]/images/graemlins/heart.gif[/img] in a $1-2 blinds game. UTG, very laggy player, limps in. I make it $9 to go, only he calls.

Flop is A[img]/images/graemlins/heart.gif[/img]J[img]/images/graemlins/diamond.gif[/img]6[img]/images/graemlins/diamond.gif[/img]. He leads $20 into me, a play I'd seen him make before with a weak ace against another preflop raiser. He has $40 left, I have him covered. Given the draw on the board, what's the best line against a player like this?