Pre-heat oven to 400 degrees and spray a foil-lined baking sheet with non-stick spray; set aside.
In a medium bowl. combine beef with ricotta, parmesan, egg whites, garlic, parsley, salt, nutmeg and pepper. Be careful not to over-mix - that causes dense, dry meatballs.
Using a small cookie scoop or two spoons, scoop out the meat mixture and roll into balls and place in an even layer on the baking sheet.
Bake for 20-25 minutes or until browned. Add to pasta sauce of choice and serve over whole wheat spaghetti.
Notes
Note: Serving size will vary depending on the size of your meatballs. If you're watching calories, divide the meat mixture in four and make sure you only eat 1/4 of the total mixture.