Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Place the broccoli florets, diced bell peppers, and red onion on the baking sheet.
Drizzle half of the olive oil over the vegetables and sprinkle with half of the sea salt and black pepper, tossing to coat evenly.
Roast the vegetables in the oven for 15 to 20 minutes, or until they are tender and the edges are slightly charred.
While the vegetables roast, heat the remaining olive oil in a large skillet over medium-high heat.
Add the ground turkey to the skillet, breaking it into crumbles with a wooden spoon, and cook until no longer pink.
Stir in the minced garlic, dried oregano, and the remaining salt and pepper, cooking for another 2 minutes until fragrant.
In a large serving bowl, combine the cooked quinoa, sautéed turkey, and roasted vegetables.
Drizzle the fresh lemon juice over the bowl and toss everything together before serving warm.