How to Make It
Put the bulgur in a large bowl and stir in enough water to cover. When the wheat dust and chaff rise to the surface, pour off the water. Rinse the bulgur 3 or 4 more times, until the water is clear. Cover the bulgur with fresh water and let it soak for 20 minutes.
Pour off the water, then squeeze the bulgur dry. Transfer the bulgur to a large bowl and add the tomatoes. Stir in the parsley, mint, onion, salt, pepper and allspice, then add the olive oil. Gradually add the lemon juice, tasting the Tabbouleh until it is balanced; it should be lemony but not unpleasantly tart. Cover and let stand for 20 minutes. Garnish with the scallions.