no reads. what is most +EV play on the flop in this situation?

Party Poker No-Limit Hold'em, $ BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($19.65)
Hero ($24.25)
BB ($11.04)
UTG ($26.75)
UTG+1 ($24.29)
MP1 ($9.55)
MP2 ($26.60)
CO ($16.63)

Preflop: Hero is SB with J, J. Hero posts a blind of $0.10.
UTG calls $0.25, 5 folds, Hero (poster) raises to $1.00, BB calls $0.75, UTG calls $0.75.

Flop: ($3) 7, K, 2 (3 players)
Hero ?