I'm not going to say a lot here, only that the market in La Spezia (very close to Riomaggiore and the other Cinque Terre towns) is outstanding. Great FLP and a lot of really special elaborated foods (breads, cheeses and olives stand out, although we missed the olive boat).
grana padano cheese
Side note about that Grana Padano: I was saving half of it to take home with me to Bilbao. Then, on my last night in Milan, I broke down and ate it ALL, by myself, in the hotel room, watching QVC in Italian.
It was so good I didn't even mind that I was watching QVC in Italian.