Thoroughly cover a baking sheet with parchment paper or cooking spray.
In a large bowl add ground turkey, quinoa, red onion, garlic, parsley, basil, oregano, egg, salt and pepper. Mix well to combine. Roll into 1 to 1-1/2 inch balls and add to prepared baking sheet, spacing evenly.
Bake for around 30 minutes until the meatballs are firm and cooked throughout.
While the meatball are baking heat the tomato sauce in a large saucepan. Transfer the meatballs to the tomato sauce and stir to coat them. Sprinkle some parsley on top. Serve the meatballs alongside the lettuce leaves.