♪ >> anthony: time stopped. that's what it seems like in the city of saint-louis when the sun is at its highest and the streets are empty. 160 miles up the coast from dakar, the one-time capital was a hub for all french west africa --an important port at the mouth of the senegal river. >> anthony: uh, s'il vous plait une baguette. comme ça. >> anthony: every culture has an iconic, much loved, street food --the kind of thing you yearn for when you're away. we have our dirty water hot dogs in new york, here they have ndambé. >> anthony: uh, ndambé s'il vous plait. oui. >> anthony: what people have described as a bean sandwich, but what is really a spread of spicy lentils on a baguette.