The largest ethnic group in Argentina, perhaps is Italian. (Perhaps second to Spanish, I am open to correction.)
Italians are also well-represented in southern Brasil, where I lived in 1971 with a family that blended 1st generation Italian with longtime Brasilians of Portuguese ethnicity. I was exposed to some very good food, including things that the wife (the Portugues half) had mastered to fulfill her husband's expectations, like risotto. A risotto (in addition to the white rice to underlay the beans) was a regular at weekend dinners, alternating with a macaroni, many of which were quite deliciously sauced with fish/shellfish.
On the subject of braciole, I favor a recipe given to me by an Italian co-worker from Port Chester, NY. She was a delightful woman, then (earlyl 70s) in her mid-50s, 1st generation of Sicilian parentage. She provided me with lots of recipes that I still use, and diagrams of how to properly plate and serve things (including the Xmas antipasto) that I treasure. She told me one day that she thought I would marry an Italian because "you're more like one of us." She was wrong, but my (non-Italian) husband is a big fan of her recipes, especially the braciole. Nothing but breadcrumbs, some pecorino, parsley, salt and pepper. Roll, brown, cook in a simple tomato sauce. I sometimes now add some fresh thyme. These are for the little braciole.
She was also the first person to educate me on how to match sauces with pasta shapes. She favored a good small shell for this, orechiette is now more common but I don't remember it being generally available then.
She was a tiny woman with a big (dyed) blond helmet of hair, and drove a real muscle car, which I found hilarious. A GTO, if I remember correctly.
All this reminds me that I have some meat in the freezer for making braciole which I didn't have time to make when I purchased it.