Preheat the oven to 400°F.
In a large bowl, combine ground chicken, breadcrumbs, Parmesan cheese, parsley, garlic, egg, lemon zest, salt, pepper, and oregano. Mix until just combined.
Form the mixture into meatballs, about 1 inch in diameter, and place them on a baking sheet lined with parchment paper.
Drizzle the meatballs with olive oil and bake for 20-25 minutes, or until cooked through and golden brown.
While the meatballs are baking, bring chicken broth to a boil in a medium saucepan.
Add orzo and cook according to package instructions until al dente, about 8-10 minutes. Drain any excess liquid.
Once the meatballs are done, remove them from the oven and toss them in a bowl with lemon juice.
Serve the meatballs over the orzo, garnished with additional parsley if desired.