i have two lines here that i like better.
my main line here against a passive player is to reraise the flop, bet turn, and check river UI.
alternately, you could just use the free showdown raise on the turn.
if he shows more aggression, it's an easy fold.
both of these approaches make use of your superior position to get extra money in when you improve and pay the same (or less)to see a showdown UI.