Adjust your oven racks so your oven is divided into thirds. Preheat the oven to 400°F.

In a large mixing bowl, combine beef, pork, onion, garlic, breadcrumbs, parmesan cheese, eggs, and whole milk. Add salt and pepper to taste.

Add chopped herbs to the bowl and combine everything using clean hands. Do not overwork.

Form the mixture into balls and arrange them on two baking sheets. Do not overcrowd.

Place the meatballs in the oven for 8 minutes. Remove from oven, turn each meatball, and return to the oven for another 8 to 10 minutes or until several meatballs have an internal temperature of 160°F. Set aside.

While the meatballs are baking, cook the pasta according to package directions. Drain, rinse, and set aside.

Pour the marinara into a skillet over medium-low heat. Add the baked meatballs to the sauce. Turn the meatballs while cooking to fully coat them in the sauce.

Pile the cooked spaghetti onto a serving platter, top with the saucy meatballs, and garnish with parmesan and fresh basil.