In a large bowl, combine turkey, breadcrumbs, Parmesan cheese, egg, dill, salt, and pepper. Mix well and form into small meatballs.
In a large pot or Dutch oven, bring chicken broth to a boil. Add orzo pasta, carrots, and celery. Cook for 8-10 minutes, or until pasta is almost tender.
Gently add meatballs to the pot and cook for another 8-10 minutes, or until cooked through.
Remove pot from heat. Slowly drizzle in lemon juice while stirring constantly. Then, slowly drizzle in whisked egg while stirring constantly to create a creamy texture.