In a Food Processor, blend garlic and onion until it is a paste form.
In a Large Mixing, add Ground Beef, Ground Italian Sausage, garlic and onion blend, Eggs, Italian Style Bread Crumbs, Milk, Parmesan Cheese, Salt and Pepper. Mix well by hand.
Add Large Mixing bowl ingredients to a Kitchen aid Stand Mixer. Mix with paddle for up to 2 minutes.
Heat oven to 425°F
Form the meatballs. Using a large cookie scoop or a spoon, scoop and roll the mixture into 3-tablespoon balls and place them on a baking sheet. (Tip: Place a cup of water and dip the cookie scoop in water as needed to prevent meat from sticking)
Add water to baking sheet until pan is halfway filled with water.
Bake for 10-12 minutes, or until an internal temperature of the meatballs is 160°F. Remove pan and dump water out.
Place meatballs in a serving bowl and serve right away.