Thaw the meatballs in a microwave-safe dish for 2 minutes.
Stir remaining ingredients for the meatballs together with a fork.
Pour over meatballs and stir.
Cover and cook in microwave for 3-5 more minutes or until hot.
Stir cucumber and yogurt together in a small bowl.
Serve meatballs in pita bread and garnish with cucumber-yogurt sauce.