This refreshing, veggie-centric summer picnic menu draws inspiration from all around the Mediterranean:green gazpachofrom Spain,eggplant dipfrom Lebanon,pita pockets stuffed with Greek salad, and anItalian riff on tuna sandwiches.(Substitute high-quality tuna in olive oil if you want to skip the poaching step.) The dessert,rustic fig-and-raspberry crostatas, are Italian in name but might be found in the south of France as well.