Place bread in a bowl; pour milk over it. In another bowl, mix veal and pork. Add onion, garlic, zest, and parsley. Add salt and pepper. Mash bread mixture to form paste; add to meat mixture. Mix; add egg. Combine well. Cover with plastic wrap; chill 1 hour.

Preheat oven to 350 degrees. Form mixture into twelve to sixteen 1 1/2-inch balls. Heat 1/2 tablespoon oil in a skillet over medium heat. Saute half the meatballs until brown, a few minutes on each side. Transfer to a pan big enough to hold all the meatballs. Repeat with remaining oil and meatballs. Repeat with remaining oil and meatballs. Place in oven to finish cooking, about 20 minutes. Serve.