Preheat oven to 425°.
Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat. Add the onion, and sauté 3 minutes. Combine the onion and the next 10 ingredients (onion through egg). Shape meat mixture into 30 (1 1/2-inch) meatballs, and place on a broiler pan coated with cooking spray. Bake at 425° for 20 minutes or until done.
Combine the Lemon-Herb Orzo and meatballs in a large bowl. Drizzle each serving with 1/2 teaspoon olive oil.