Step #2 Line a 15x10x1-inch baking pan with foil wrap (heavy-duty is best); spray foil wrap with non-stick spray.
Step #3 Beat egg In a large-ish bowl, mix in all remaining ingredients (hands work best; I wear latex gloves).
Step #4 Shape the beef mixture into an 8-inch square on the foil wrap-lined pan & cut into 36 squares; do not separate squares.
Step #5 (I recommend using a pizza wheel or metal dough scraper to cut the squares - you are less likely to cut through the foil wrap & mar the pan.
Step #6 ).
Step #7 Bake at 425F F for 20 to 25 mins or until meatballs are thoroughly cooked & no longer pink in center.
Step #8 Cut apart meatballs (again I prefer to use a pizza wheel or metal dough scraper).
Step #9 Use as needed in any recipe calling for meatballs.
Step #10 Freezing Tip: Freeze meatballs individually first, then separate into recipe-sized portions & place this in freezer containers or freezer bags; Use within 2 months.