Preheat your grill or grill pan over medium-high heat.
In a small bowl, combine the olive oil, lemon juice, salt, and pepper to create a marinade.
Brush the turkey breast evenly with half of the marinade and let it sit for about 10 minutes.
Grill the turkey breast for approximately 6-7 minutes per side, or until the internal temperature reaches 165°F.
While the turkey is grilling, preheat your oven to 425°F. Toss the broccoli florets with a little olive oil, salt, and pepper, and spread them on a baking sheet.
Roast the broccoli in the preheated oven for about 15 minutes, until tender and slightly crispy on the edges.
Prepare the quinoa according to package instructions (if not pre-cooked), then measure out 1/4 cup cooked quinoa.
Plate the grilled turkey alongside the roasted broccoli and quinoa. Drizzle any remaining marinade over the turkey for extra flavor.
Serve immediately and enjoy your balanced, protein-packed lunch.