Remove the kibbeh balls from the fridge and get ready to stuff! You’ll be using your hands for this, it may help if they’re slightly wet (to keep the kibbeh from sticking). While holding a ball in one hand, use the thumb of your other hand to press a hole into the center of it. Now, work your way around the edges of the hole, rotating the ball as you go, to form a cup or bowl for the stuffing. The thinner you can get it the better, but it does take practice and also depends on the consistency of your kibbeh.