Preheat your oven to 400°F (200°C) 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 15-20 minutes until the edges are tender and slightly charred.
While the broccoli roasts, ensure your quinoa is cooked according to package instructions using water or a low-sodium vegetable broth for extra flavor.
Season the chicken breast with dried oregano, salt, and pepper.
Heat a grill pan over medium-high heat and lightly coat with a tiny bit of oil or cooking spray.
Grill the chicken for 6-7 minutes per side, or until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing it into strips.
In a small bowl, whisk together the remaining teaspoon of olive oil and the lemon juice.
Fluff the quinoa with a fork and toss it with the lemon-oil dressing.
Plate the quinoa and roasted broccoli, then top with the sliced grilled chicken.