Preheat your grill or grill pan over medium-high heat.
Season the chicken breast with a pinch of salt, black pepper, and a dash of garlic powder.
Grill the chicken for about 6-7 minutes per side, or until the internal temperature reaches 165°F. Set aside to rest for a few minutes.
While the chicken is grilling, preheat your oven to 425°F to roast the broccoli. Toss the broccoli with olive oil, salt, and pepper.
Spread the broccoli in a single layer on a baking sheet and roast for about 15 minutes, stirring halfway through, until tender and slightly caramelized.
Prepare cooked quinoa according to package instructions if not already made. Typically, combine rinsed quinoa with water, bring to a boil, then simmer for 15 minutes.
Plate the grilled chicken alongside the cooked quinoa and roasted broccoli. Serve warm and enjoy your balanced, nutrient-packed lunch.