Source: 1000 Foods (pgs. 134 – 135)

            Southeastern France has a lot in common with the northwest corner of Italy, and it’s not just that they’re both called their country’s Riviera. The neighboring regions share a similar climate and terrain, and even share a lot of history. In 218 BC, Hannibal crossed the region as he marched his army from Carthaginian territory in Spain to Italy. While he is most famous for marching his army and elephants over the Alps, there is an interesting story about when he crossed the Rhone River in Provence. Modern day France was mostly occupied by the Gauls, who were Celtic peoples organized into chiefdoms. Most of the chiefs felt more threatened by Rome than by Carthage (as Rome had recently conquered other Celtic peoples in the Liguria/Piedmont region) so they aided or tolerated Hannibal’s army. The problem was that there was a hostile group near a strategic river crossing and a Roman army was on its way to try and ambush him. A bit of trickery bought Hannibal enough time to get his army across, but when the elephants found themselves on specially-built rafts they freaked out and jumped off and/or capsized them. Fortunately for the Carthaginians, elephants are actually quite good swimmers and all made it across. By the time the Romans arrived, Hannibal and his army had disappeared into the Alps.

            Over the course of the war, which lasted from 218 to 202 BC, Rome conquered the French Riviera and most of Spain. It’s not clear how many grapevines were already grown in the region, but the Romans certainly introduced new varieties and encouraged their cultivation, along with olive trees. From Provence (the name came from the Latin provincia) vines spread northward, particularly once Julius Caesar conquered the rest of Gaul (modern France) in the 50s BC. Olive trees, though restricted to the coast that far north, were also introduced and became important to Provence’s economy.

            Pesto-type sauces were part of Ancient Roman cuisine and basil appeared in the Medieval Era, but what’s interesting about this soup is that most of the ingredients deemed essential originated in the Americas. White beans, green beans, potatoes, and tomatoes were all introduced after Columbus, and the latter two took a few centuries to catch on. Fortunately they did, because this soup is a balanced meal in a bowl. There’s starch in the potatoes, protein in the beans, vitamins and minerals in the vegetables, and a bit of fat from the olive oil.

            Ms. Sheraton explains that as long as there are both types of beans, potatoes, and tomatoes, the other vegetables can vary based on what’s available. Since it sounded like a chef’s choice kind of dish, I created my own plan from the general description. Onions, tomatoes, and white beans went in first, with enough water to cover by about an inch. For meatless vegetable soups it is important not to add too much water to avoid diluting the flavor. I added the potatoes about halfway through, then added the zucchini and green beans in the last few minutes to keep them from overcooking. The pistou, which is like a French pesto without pine nuts or walnuts, is added to the individual bowls at serving time.

            The soup was an amazing taste of summer. While the ingredients are generally available out of season, they both taste better and are more affordable at their summer peak. Tomatoes are especially seasonal, since shipping them any distance is much easier when they are underripe. At local farm stands they are ripe and red all the way through, all the vegetables are fresh, and the basil is my own. It thrives during the summer but does not do well when moved inside. I’ve tried that in the past without much success. It’s better to make maximum use of it now.