In a medium sized mixing bowl combine the ground beef, pork, breadcrumbs, egg, onion, garlic, parsley, mint, oregano, salt, pepper and milk. Mix until it is all incorporated.
Shape into 2 inch meatballs.
Add the olive oil to a medium sized skillet and turn to medium high heat.
Roll the meatballs in the flour and place them in the pan. Cook on each side until no longer pink.
Serve with pita bread, cucumbers, tomatoes, and tzatziki if desired.