Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the chicken breast and sweet potato into uniform 1-inch cubes to ensure even cooking.
Place the chicken, sweet potato, and broccoli florets on the baking sheet and drizzle with extra virgin olive oil.
Sprinkle the sea salt, black pepper, garlic powder, and smoked paprika over the ingredients and toss thoroughly to coat.
Spread the mixture in a single layer and roast for 20 to 25 minutes, or until the chicken is cooked through and the sweet potatoes are tender.
While the tray roasts, place the chopped kale in a bowl and massage it with half of the lemon juice for one minute to soften the texture.
Once roasted, remove the tray from the oven and serve the chicken and vegetables over the bed of kale.
Drizzle the remaining lemon juice over the top before serving.