BEIRUT: For more than a century, the Tabbara family has been serving up falafel to Beirut’s residents. Their business, which predates Lebanon’s founding, has survived two world wars and a series of local conflicts in the small Mediterranean nation. Now, a fourth generation is getting ready to take over the modest shop, where customers can get $3 sandwiches of small, doughnut-shaped patties of deep-fried ground fava beans wrapped in flat Lebanese bread with pickled cucumber, tomatoes, parsley,