In a medium saucepan, combine the rinsed quinoa and chicken broth. Bring to a boil, then reduce heat to low, cover, and simmer for about 15 minutes, or until the quinoa is fluffy and the liquid is absorbed.
In a large mixing bowl, combine the shredded chicken, cherry tomatoes, chopped spinach, half of the mozzarella cheese, pesto sauce, garlic powder, onion powder, salt, and pepper. Mix well to ensure all ingredients are coated with pesto.
Add the cooked quinoa to the chicken mixture. Stir until everything is evenly combined.
Lightly grease a 9x13-inch baking dish with olive oil. Pour the quinoa and chicken mixture into the dish, spreading it evenly.
Sprinkle the remaining mozzarella cheese over the top of the dish.
Place the baking dish in the preheated oven and bake for about 25-30 minutes or until the cheese is bubbly and slightly golden.
Once baked, remove from the oven, let it cool for a few minutes, and then garnish with fresh basil leaves if desired.
Notes
Feel free to use homemade pesto for a fresher taste.