Bring a pot of water to a boil. With a paring knife, cut out the core of the tomato. Turn the tomato over and cross slash the bottom of the tomato. Immerse the tomato in boiling water for about 10 seconds, depending on the ripeness, or until the skin starts to curl and blister. Remove the tomatoes from the water and shock in an ice-bath. Using a knife, peel the skin off the tomatoes. To seed the tomato, gently squeeze the seeds out. For concaise, using a French knife, cut the tomato in half, slice, and roughly chop.