First find a pig and kill it. Then pick up the pork. Next create a furnace with cobblestone. Place the pork in the furnace, along with wood or coal as fuel. Then put the difficulty to easy or higher to let some of your hunger bar deplete. Next, you will be easy to eat the pork chop.
Note: It takes a while for achievements to pop in this game. It seems as if every 2 minutes or so all achievements will unlock, which you've unlocked in the mean time.