Combine 3 cups boiling water and bulgur in a medium bowl; let stand 30 minutes or until water is absorbed. Fluff with fork. Combine bulgur, tomato, and next 4 ingredients (through onion) in a bowl; set aside.
Combine 1/4 cup water and remaining ingredients, stirring well with a whisk. Pour dressing over bulgur mixture, tossing gently to coat.