In a bowl, toss the beef with two tablespoons of water, the baking soda, and some ground pepper, and set it aside.
Put the pancetta in a food processor and pulse until finely chopped. Add the onion, carrot, and celery and pulse more until it all forms a paste.
Heat the butter and oil in your dutch oven over medium-high. Add the pancetta/veg paste and a dash of pepper and cook for about 8 minutes to cook off some liquid.
Spread the mixture out throughout the bottom of the dutch oven and keep cooking, stirring occasionally, for another ~10 minutes. Some of it will brown and stick to the bottom; that's what you want.
Add the tomato paste and cook for about two more minutes.
Reduce the heat to medium, add in the beef, and cook, breaking the meat up with your spatula. Cook for about 5-6 minutes, until the beef is no longer pink.
Add in your sherry/vinegar (or a cup of wine) and scrape up the browned bits from the bottom as you stir. Cook until it evaporates and thickens, about five more minutes.
Add in the broth, parmesan, and about a cup and a half of water. Bring this to a simmer and reduce heat to low, cover, and cook for another 20 minutes.
Bring heat back up to medium-high and bring it to a boil. Add in the pasta and cook, stirring, until the pasta is done, about 10-12 minutes.
Adjust consistency by cooking a bit more or adding a bit more water, season with salt and pepper, and serve topped with more parmesan. Enjoy!