Preheat oven to 400 degrees F and line baking sheet with parchment paper. Set aside. Make Greek yogurt blue cheese dressing and refrigerate to let flavors develop.
In a large bowl, add ground chicken, egg, breadcrumbs, celery, carrot, green onion, garlic, hot sauce, salt and pepper. Mix with a spatula until combined and do not overmix.
Using small trigger scoop, form about 26 meatballs (it helps to dip hands into a bowl with cold water occasionally) and lay on previously prepared baking sheet.
Bake for 18-20 minutes or until cooked through and lightly brown.
Remove from the oven, transfer meatballs to a large bowl, drizzle with hot sauce and gently toss to coat with spatula.
Serve warm garnished with green onion and with previously prepared blue cheese sauce for dipping.
