If using dry quinoa, prepare the quinoa. Quinoa is cooked at a 1 part quinoa to 2 parts water ratio.
While the quinoa cooks, slice the zucchini and summer squash. Halve the cherry tomatoes.
Place a pan over medium-high heat. Add 1 tablespoon of avocado oil. Once it is shimmering, add the chicken, season with salt and pepper on each side, then cook for about 4 minutes per side, or until golden brown with an internal temperature of 165°F. Transfer the chicken to a plate and tent loosely with aluminum foil.
Turn the heat to medium. Add remaining 2 tablespoons of oil to the pan. Add the garlic and let cook for 30 seconds, until just fragrant. Add the zucchini, summer squash, tomatoes, herbes de Provence, and salt and pepper to taste. Place a lid over the pan and cook for 5 minutes. Remove the lid and cook for an additional 5 minutes.
Stir in the chickpeas. Once warmed through, 2-3 minutes, you are ready to serve.
Slice the chicken.
Serve the rice, chicken, and vegetable and chickpea mixture topped with chopped basil.