Combine all ingredients for Cheese Filling and mix thoroughly.
Portion 6 equal amounts onto individual pieces of plastic wrap. Tightly wrap each portion of cheese filling and place in freezer for 30-60 minutes.
Preheat oven to 350.
Combine all ingredients for the Meatballs. Once evenly mixed, portion into 6 4oz hamburger patties.
Remove the cheese balls from the freezer and unwrap them.
Place 1 cheese ball onto each hamburger patty and form a meatball shape around the cheese center using both hands. Try to get the cheese centrally located within the meat so that it doesn't leak out during cooking.
Place meatballs into a cast iron skillet on high heat. Sear on each(6) side for 2 minutes. (Use any pan you have available. If it is not oven safe, transfer meatballs to a baking sheet after searing and place in oven.)
Place meatballs in oven on 350 for 20 minutes.
Remove Giant Stuffed 3 Cheese Meatballs from the oven and allow to rest for 5 minutes. Cut open, admire, enjoy!