Cook the veggies: In a large Dutch oven or pot, heat the olive oil over medium heat. Then, add the onions, celery, and carrots. Add 1/2 teaspoon of sea salt and 1/4 cup water. Cook over medium heat for 10 minutes. Stir frequently. The veggies will begin to get nice and tender.
Add the garlic: Add the garlic to the veggies and cook for another 30 seconds, allowing the garlic to get aromatic, but not burn. Give this a good stir.
Add the meat: Add the meat to the veggies. Cook for 10 minutes or until all the pink is gone. Be sure to break up the meat into a crumble and stir. By now you should have those coveted brown bits developing on the bottom. Get 'em!
Drain the fat: Remove the mix from the heat. Carefully spoon out most of the fat and discard.
The tomatoes, wine, sugar, salt, and herbs: Return the mix to the heat and add the crushed tomatoes, paste, wine, sugar, 1 teaspoon salt, and herbs to the veggies and meat. Cook for another 10 minutes over low heat, allowing the sauce to simmer.
Add the milk: Slowly drizzle in the milk, while stirring. Allow the sauce to finish simmering for another 5 minutes. You can leave this out if you want to go dairy free, but this adds a rich, velvety element that's worth the extra step.
Serve ragu alla bolognese over your pasta of choice!