Preheat the oven to 375°F (190°C). Spray a baking dish with nonstick cooking spray and set aside.
In a large bowl, combine the ground beef, long grain white rice, salt, pepper, onion powder, Italian seasoning, egg white, and fat free milk. Mix until evenly combined.
Form the mixture into 24 small meatballs and place them evenly in the prepared baking dish.
Pour the marinara sauce over the meatballs and add 1/2 cup water. Cover the dish tightly with aluminum foil.
Bake covered for 1 hour and 15 minutes (75 minutes). Remove from the oven and let cool for 10 minutes before serving.
Top with chopped fresh basil if desired and serve.
Notes
Macro info provided is for 6 meatballs (1 serving).
With ground beef: 369 calories; 14.7g fat; 27.5g carbs; 29.5g protein per serving.
With ground turkey: 339 calories; 5.4g fat; 36.5g carbs; 32.5g protein per serving.