New Delhi, Nov. 13 -- 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, thick tahini sauce and homemade dark red-hot pepper paste for the spice lovers.

"I have clients spread all over the world," 82-year-old Mohammed Tabbara said as a European customer waited for a sandwich in Beirut's busy Hamra district that's packed with cafes, clothing shops and two major universities.

"They all come to eat fa...