01 - In a large mixing bowl, combine the ground meat, breadcrumbs, Parmesan cheese, egg, minced garlic, milk, salt, black pepper, and chopped basil. Gently mix until just incorporated—avoid overworking the mixture to keep the meatballs tender.
02 - Roll the mixture into golf ball–sized portions, yielding approximately 16 meatballs. Place them on a plate or tray as you work.
03 - Heat the olive oil in a large skillet over medium heat. Arrange the meatballs in the pan and cook, turning frequently, until evenly browned on all sides, about 6 minutes. Transfer to a plate and set aside—they will finish cooking in the sauce.
04 - In the same skillet, add the chopped onion and sauté until softened and translucent, 3 to 4 minutes. Add the minced garlic and cook for 30 seconds until fragrant.
05 - Pour in the crushed tomatoes and broth. Season with salt, pepper, and sugar if using. Stir to combine and let the sauce simmer for 5 minutes to develop flavor.
06 - Stir in the heavy cream and 1/4 cup of grated Parmesan cheese until smooth. Fold in the chopped fresh basil, then return the browned meatballs to the skillet, nestling them into the sauce.
07 - Reduce the heat to low and simmer uncovered for 15 to 20 minutes, gently turning the meatballs occasionally, until they are cooked through and the sauce has thickened to a creamy consistency.
08 - Taste the sauce and adjust seasoning as needed. Garnish with extra fresh basil leaves and serve over pasta, rice, or alongside crusty bread.