You know him as the Soup Nazi, the inspiration for that enduring Seinfeld character. Now soup chef Al Yeganeh's a franchise, with a stand at the Willow Grove Mall. The "rules" — "Pick the soup you want!" "Have your money ready!" — are posted, but the staff has none of the caricatured brusqueness. While there's no line around the block here, the soups, especially the signature bisques, are hearty and satisfying, loaded with indentifiable vegetables.