Begin by preparing the quinoa. In a medium saucepan, bring the chicken broth to a boil. Add the rinsed quinoa, stir, and reduce the heat to a simmer. Cover and cook for about 15 minutes, or until the liquid is absorbed and the quinoa is tender.
While the quinoa is cooking, zest and juice your lemons.
Once the quinoa is done, remove it from the heat and let it sit, covered, for 5 minutes. Then, fluff it with a fork and transfer it to a large bowl. Stir in the lemon juice, olive oil, parsley, basil, minced garlic, salt, and pepper.
For the grilled chicken, start by pounding the chicken breasts to an even thickness.
In a mixing bowl, whisk together the lemon zest, lemon juice, olive oil, oregano, thyme, minced garlic, salt, and pepper. Add the chicken breasts, ensuring they are well coated with the marinade. Cover and refrigerate for at least 30 minutes, or up to 4 hours.
Preheat your grill to medium-high heat. Grill the chicken for 6-7 minutes on each side, or until the internal temperature reaches 165°F (74°C).
Once the chicken is cooked, let it rest for a few minutes before slicing.
Serve the grilled chicken atop the lemon herb quinoa, garnishing with additional fresh herbs if desired.