No matter what people in the rest of the world do to it, the classic pesto sauce of its birthplace in Genoa, Italy, has just seven ingredients: basil, pine nuts, Parmesan and pecorino cheeses ...

We are in Genoa, Italy. Here is where pesto was invented. And ask any Genoese you know, and they will tell you that pesto made outside of the city just can't compete with the one that is made here.

Following is a transcript of the video. Claudia Romeo: Today we're in Genoa, on the Italian Riviera. This city is famous for many things, like its ancient port, the aquarium, but most of all ...