Ingredients:
For the Meatballs:
1 cup (about 50 grams) day-old sourdough bread cubes (crust removed)
1 cup (240 ml) whole milk
2 tbsp (30 ml) extra-virgin olive oil
1 medium red onion, finely chopped
8 ounces (228 grams) ground veal
8 ounces (228 grams) ground chuck
8 ounces (228 grams) lean ground pork
8 ounces (228 grams) sweet Italian sausage (about 2), removed from casings and crumbled
3 tbsp dried oregano, preferably Sicilian
1/2 cup (2 ounces/56 grams) freshly grated Parmigiano-Reggiano cheese
1/2 cup (2 ounces/56 grams) freshly grated Pecorino Romano cheese
2 large eggs
1/4 cup (10 grams) chopped fresh Italian parsley
1 tsp kosher salt
1/2 tsp freshly ground black pepper

For the Sauce:
1/4 cup (60 ml) extra-virgin olive oil
1/2 medium red onion, minced
1 garlic clove, minced
1 tablespoon tomato paste
1/2 cup (120 ml) dry red wine
Two 28-ounce (794-gram) cans Italian plum tomatoes, preferably San Marzano, with the juice, pureed in a food processor or food mill
1 teaspoon kosher salt, or more to taste
1/2 teaspoon crushed red pepper flakes, or more to taste (optional)

2 tablespoons kosher salt
1.5 pounds (680 grams) spaghetti or linguine

Directions:
For the Sauce:
1. Heat a 10-quart casserole over medium heat, and when it is hot, add the olive oil.
2. Add the onion and garlic and cook until wilted.
3. Add the tomato paste and stir for 1 minute.
4. Add the wine, tomatoes, 1 teaspoon of salt, and red pepper flakes and bring to a boil.
5. Reduce the heat to low and simmer gently for 30 minutes, stirring occasionally.
6. Season with salt and red pepper flakes to taste if necessary.

While the Tomato Sauce is Cooking, Form the Meatballs:
1. Take a piece of meat the size of a golf ball and roll it between the palms into a ball.
2. Add it to the sauce, and repeat with the remaining meatballs.
3. Return the sauce to a simmer and simmer gently until the meatballs are cooked through, about 1.5 hours. Be sure to cook the meatballs at a very gentle simmer; if the sauce boils, the fat will separate from the meat and they will dry out.
4. When you think they are done, remove one from the pot and cut into it with a paring knife. If it is still pink in the middle, continue to cook until done, another 10 to 15 minutes.

Pasta:
1. Just prior to serving, fill a 10-quart stockpot with 7 quarts (6.5 liters) of water and bring to a boil.
2. Add the 2 tablespoons of salt and spaghetti and cook until al dente.
3. Drain, add to the pan with the meatballs and sauce, and carefully toss to coat. Serve immediately.

Tips: To see if you’ve added enough salt and pepper to the meatball mixture, before shaping the meatballs, bring a small pot of water to a boil. Pinch off a grape-sized piece of meatball mixture, roll it into a ball, and drop it in the pot. When it is cooked through, in about 2 minutes, taste it and adjust the seasoning before rolling all of your meatballs.
To roll nice round meatballs without having the meat stick to your hands, moisten your hands with cold water before you start, and then again as necessary.
Wine: This calls for a solid but not murderously expensive Chianti. No need to buy a Riserva; just don’t buy anything in a straw-covered bottle. If an American wine is in order, try a good Zinfandel from Ridge Vineyards.