Preheat your grill or grill pan over medium-high heat.
Season the chicken breast with a pinch of salt, black pepper, and garlic powder.
Grill the chicken for about 6-7 minutes per side or until the internal temperature reaches 165°F, then let it rest for a few minutes before slicing.
While the chicken is grilling, preheat your oven to 400°F.
Toss the broccoli with 1 teaspoon of olive oil, a pinch of salt, and black pepper. Spread it on a baking sheet and roast for about 15 minutes until tender and slightly crispy.
If not already prepared, cook quinoa according to package instructions, usually simmering in water for about 15 minutes until fluffy.
To assemble, serve the sliced grilled chicken over a bed of quinoa and top with the roasted broccoli. Drizzle the remaining teaspoon of olive oil over the dish for added richness.
Optional: Squeeze a little lemon juice on top for a bright finish.