Preheat your oven to 425°F for roasting the broccoli.
Season the chicken breast with salt, pepper, and any preferred herbs. Preheat your grill or grill pan over medium-high heat.
Grill the chicken breast for about 6-7 minutes per side or until it reaches an internal temperature of 165°F. Once cooked, let it rest for a few minutes before slicing.
While the chicken is grilling, rinse the quinoa under cold water. In a pot, bring 1 3/4 cups of water to a boil, add the quinoa, reduce heat to low, cover, and simmer for about 15 minutes until all water is absorbed.
Chop the broccoli into florets, toss with olive oil, salt, and pepper. Spread on a baking sheet and roast in the preheated oven for approximately 15-20 minutes, until edges are crisp and the broccoli is tender.
Plate the sliced grilled chicken alongside a serving of quinoa and roasted broccoli. Enjoy your balanced lunch!