Created by Sweetopia on April 28, 2015
Step 1: In the bowl of a stand mixer, combine bread with buttermilk, tossing to coat. Let stand, tossing occasionally, until bread is completely moist, about 10 minutes. Squeeze bread between your fingers or mash with a spoon to make sure there are no dry spots. Add onion, minced garlic, Parmigiano-Reggiano, parsley, salt, pepper, egg, and Italian seasoning to bread/buttermilk mixture.
Step 2: Set mixer bowl in stand mixer and attach paddle. Starting at low speed and gradually increasing to medium-high speed, beat bread mixture until thoroughly blended, stopping to scrape down sides as necessary. Add 1/3 each of the beef and pork and beat at medium-high speed until thoroughly blended with bread mixture.
Step 3: Remove bowl from stand mixer and add remaining beef and pork. Using a clean hand, gently mix meatball mixture, teasing apart ground meat with your fingers, just until ground beef and pork and thoroughly distributed throughout; avoid mixing any more than is necessary for even distribution.
Step 4: Shape into desired size balls.
Step 5: Cook as desired in sauce or on a greased baking pan in the oven.