Meanwhile, peel the tomatoes with a vegetable peeler. Working over a coarse sieve set over a bowl, cut the flesh from the tomatoes and transfer to a shallow bowl. Allow the seeds, core and juices to fall into the sieve. Crush the tomato cores and press the juice through the sieve. Add the juice to the bowl with the tomato flesh; discard the seeds and cores. Season the tomato with 1/2 teaspoon of salt and let stand until more juices are released, about 25 minutes.