01 - Preheat oven to 400°F. Line a baking sheet with parchment paper and set aside.
02 - In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, milk, egg, minced garlic, parsley, oregano, salt, and pepper. Mix gently until just combined, being careful not to overwork the mixture. Shape into 16 to 18 uniform meatballs and arrange on the prepared baking sheet.
03 - Bake for 15 to 18 minutes until golden brown on the outside and cooked through to an internal temperature of 160°F.
04 - While the meatballs bake, heat olive oil in a large skillet over medium heat. Add the chopped onion and sauté until softened and translucent, about 3 minutes. Add the minced garlic and cook for 1 additional minute until fragrant.
05 - Pour in the crushed tomatoes, broth, sugar, salt, and pepper. Stir to combine and bring to a gentle simmer. Cook for 7 to 8 minutes, allowing the sauce to reduce slightly and the flavors to develop.
06 - Reduce heat to low and stir in the heavy cream until the sauce is smooth and uniformly blended. Add the chopped fresh basil and simmer for 2 more minutes.
07 - Transfer the baked meatballs into the skillet with the sauce. Cook over low heat for 5 minutes, spooning the sauce over the meatballs so they absorb flavor and heat through evenly.
08 - Serve hot, garnished with additional fresh basil leaves. Pairs well with pasta, rice, or crusty bread.