Preheat your grill to medium-high heat and your oven to 425°F for the broccoli.
Season the chicken breast lightly with salt, pepper, and your favorite herbs.
Grill the chicken breast for about 5-6 minutes per side, or until the internal temperature reaches 165°F.
While the chicken is grilling, toss the chopped broccoli with olive oil, salt, and pepper, and spread on a baking sheet.
Roast the broccoli in the preheated oven for 15-20 minutes, stirring halfway through, until lightly browned and tender.
Rinse the quinoa under cold water. In a small pot, combine the quinoa with water (using a 1:2 quinoa to water ratio) and bring to a boil.
Reduce heat to a simmer, cover, and cook for about 15 minutes until the water is absorbed and the quinoa is fluffy.
Plate the grilled chicken breast with a side of roasted broccoli and a serving of quinoa, and enjoy a balanced, nutritious lunch.