Cut the top one-third from the stem end of 4 tomatoes. Set the caps aside. Remove the cores, seeds, juice
, and ribs from the tomatoes. Save the ribs, but discard the rest. Gently dry the insides of the tomatoes with a piece of absorbent paper. Lightly sprinkle the insides of the tomatoes with salt
. Invert the tomatoes on a rack for at least 20 minutes.