Preheat your oven to 400°F and line a large baking sheet with parchment paper.
In a bowl, toss the cauliflower florets, cooked quinoa, and cooked lentils with half of the olive oil and a pinch of sea salt.
Spread the mixture evenly on the baking sheet and roast for 18-20 minutes until the cauliflower is golden and the quinoa is slightly crisp.
While the vegetables roast, mince the garlic and season the chicken breast with sea salt, black pepper, dried oregano, and the minced garlic.
Heat the remaining olive oil in a non-stick skillet over medium heat and cook the chicken breast for 5-7 minutes per side until the internal temperature reaches 165°F.
During the last 3 minutes of chicken cooking, add the chopped kale to the skillet and sauté until just wilted.
Remove the roasted quinoa and cauliflower from the oven and toss them into the skillet with the chicken and kale.
Drizzle the fresh lemon juice over the entire dish and toss gently to combine before serving.