Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Toss the broccoli florets with 0.5 teaspoon of olive oil, salt, and pepper, then roast for 15-20 minutes until the edges are lightly charred.
Season the chicken breast with salt, pepper, and dried oregano, then grill over medium-high heat for 6-7 minutes per side until the internal temperature reaches 165°F.
In a small bowl, whisk together the remaining 1 teaspoon of olive oil, lemon juice, and minced garlic to create a light dressing.
Slice the grilled chicken into bite-sized strips.
In a large bowl, combine the cooked quinoa, roasted broccoli, and sliced chicken.
Drizzle the lemon-garlic dressing over the salad and toss gently to combine before serving.