MIX meat, parsley, egg, bread crumbs, garlic, salt and pepper. Shape into 20 meatballs, each about 1 inch in diameter.
HEAT oil in medium skillet on medium-low heat. Add meatballs; cook 12 to 15 min. or until cooked through, stirring occasionally.
MEANWHILE, place cheese, yogurt, milk and 1 clove garlic in food processor or blender container; cover. Process until smooth. Mix with tomato, cucumber and dill. Serve meatballs with yogurt sauce.