Preheat the oven to 400F. Line a baking sheet with parchment paper.
Add roughly chopped red onion, mint, cilantro, and olive oil to the bowl of a small food processor then pulse until only small bits remain. Scraping down the sides with a rubber spatula as needed.
Add ground chicken plus onion/herb mixture from the food processor to a medium bowl then add all the spices (cumin through cinnamon). Mix well using a rubber spatula then let the mixture chill for at least 15 minutes.
Meanwhile, whisk together all your citrusy yogurt sauce in a small bowl until smooth.
Remove chicken mixture from the fridge then scoop into golf ball-sized meatballs and place them on the prepared baking sheet. Bake in the oven for 20-25 minutes or until no longer pink.
Meanwhile, toast your naan or pita wraps.
To serve: Spread a spoonful of citrusy yogurt sauce inside each toasted naan then top with 1-2 slices of cucumber, a few leafy greens, diced tomatoes, diced red onion, 4-5 meatballs, then a sprinkle of crumbled feta and enjoy!