Flip the onion on it's side and grab hold at least half way up from the bottom. Cut off the root end of the , beginning at least 1/2-inch from the root to remove the tough core. Flip the onion on it's side and grab hold at least half way up from the bottom. Cut off the root end of the, beginning at least 1/2-inch from the root to remove the tough core. Grab the onion, making an inverted "U" shape with your hand. Holding the onion firmly, gingerly insert the knife inside the "U" and slice the onion in half. Lay one half on cutting board with flesh side facing down. Hold the onion half, and slice off the sprout end. Start slicing at least 1/2-inch from the base of the sprout to remove the papery and withered portion of the sprout end. Pick up the onion half and begin the actual peeling process. Start at the corner of your choosing, and use your fingernail or the sharp tip of the knife to lift up the first two layers of the onion (papery husk and first thinner layer). Peel it straight back. Repeat the process for the other half.