Make a regular Greek yogurt sauce (Greek yogurt, cucumber, lemon juice or whatever variation you enjoy)
Meatballs are made of:
1/3 cup bread crumbs
1 small onion, minced
1 tsp ground cumin
1/4 tsp each garlic powder, salt & pepper
1 lb ground beef
Mix meatball ingredients, make small tbsp sized meatballs. Place on rimmed baking sheet and roast until cooked through (350 degrees). Roast any other vegetables (red onion, zucchini, tomatoes etc) that would be tasty with this at the same time.
Serve meatballs, roasted vegetables and Greek yogurt sauce in a pita.