Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toss the broccoli florets with one teaspoon of olive oil, salt, and pepper, then spread them in a single layer on the baking sheet.
Roast the broccoli for 15 to 20 minutes until the edges are slightly charred and tender.
While the broccoli roasts, season the chicken breast with minced garlic, salt, and pepper.
Heat a grill or grill pan over medium-high heat and cook the chicken for 6 to 7 minutes per side until the internal temperature reaches 165°F.
Warm the pre-cooked quinoa in a small saucepan or microwave until fluffy.
Slice the grilled chicken into strips.
Assemble the lunch bowl by placing the quinoa at the base and topping it with the chicken and roasted broccoli.
Drizzle the remaining teaspoon of olive oil and the fresh lemon juice over the entire dish before serving.