Preheat the grill to medium-high heat.
Season the chicken breast with your preferred spices (salt, pepper, and herbs) and lightly brush with a small amount of olive oil if desired.
Grill the chicken breast for about 6-7 minutes per side or until the internal temperature reaches 165°F. Let it rest for a few minutes before slicing.
While the chicken is grilling, preheat your oven to 400°F.
Toss the broccoli with the teaspoon of olive oil, a pinch of salt, and pepper, then spread it on a baking sheet.
Roast the broccoli in the preheated oven for 15-20 minutes, or until tender and slightly charred at the edges.
Prepare the quinoa according to package instructions if not already cooked.
Plate the dish by placing the quinoa as a base, adding the roasted broccoli on the side, and topping with sliced grilled chicken breast.
Serve warm and enjoy your balanced, nutrient-rich lunch.