In a large bowl, combine ground chicken, onion, garlic, oregano, salt, and pepper. Gently mix until combined.
Roll the mixture into 1-inch meatballs.
Heat olive oil in a large skillet over medium heat. Brown the meatballs on all sides.
Add chicken broth and lemon juice to the skillet. Bring to a simmer, reduce heat, and cover. Cook for 15-20 minutes, or until the meatballs are cooked through.
Meanwhile, cook orzo pasta according to package directions.
Drain the orzo and add it to the skillet with the meatballs and sauce. Toss to combine.
Serve immediately.
Notes
For extra flavor, add a pinch of red pepper flakes to the meatballs.