Bring a large pot of salted water to a boil. Meanwhile, finely chop the onion, along with the carrot and celery, and put this in a pan with olive oil to make a 'soffrito'. Chop the cherry tomatoes and add them to the soffrito.
Peel and dice the potatoes into 1 to 2 cm cubes and place them in a pan. Add the rosemary, a bit of salt, and black pepper. Sauté the potatoes for a few minutes and add some water. Cook the potatoes for 10 min. Remove the rosemary.
Add the pasta to the pan with the potatoes and add some extra water. Cook the pasta for 10 min.
Also chop the mozzarella into small pieces and fry the pancetta or guanciale in a separate pan until crispy. When the pasta is cooked, add the Parmigiano, soffrito, and smoked mozzarella. Add the crispy pancetta or guanciale and some more Parmigiano to the dish.
BUON APPETITO !!!
Tips
No extra tips needed, Just Enjoy!