Preheat your oven to 400°F (200°C).
In a large mixing bowl, combine the ground beef, fat-free milk, grated parmesan cheese, Italian breadcrumbs, chopped fresh basil, salt, pepper, and the egg white. Mix until just combined.
Portion the mixture into equal-sized meatballs, about 1 to 1.5 inches in diameter. Place them on a baking sheet lined with parchment paper.
Bake the meatballs for about 20-25 minutes, until cooked through and reaching an internal temperature of 160°F (71°C).
While the meatballs are baking, heat the marinara sauce in a saucepan over medium heat until warmed through.
Once the meatballs are cooked, place them in the warm marinara sauce for a minute.
Serve the meatballs topped with additional parmesan cheese and fresh basil. Enjoy!