Saute the onion, carrots, and celery in about 5 tablespoons olive oil in a large rondeau until soft. Add the pancetta to the soffritto (onion mixture). Cook on a medium-high flame for about 7 to 10 minutes, then add the meat; break it up well with a wooden spoon. Cook's Note: You can jack up the heat a bit, and keep stirring until all the ground meat is browned. Add the red pepper flakes and the parsley and cook for just 1 minute.
Add the wine now and cook until the alcohol is completely evaporated, scraping up the browned bits on the bottom of the pan.
Pulse the tomatoes smooth in a food processor and add them to the meat, season generously with salt and pepper, lower the flame to medium and cook for about 2 1/2 hours, stirring occasionally. Finish the sauce by adding the whole milk, stir well and set aside, to cool off.
Pelati tomatoes are whole canned tomatoes.
Recipe courtesy of Gabriele Corcos and Debi Mazar