Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and cut it into 1/2-inch cubes to ensure they roast evenly.
Place the sweet potato cubes on the baking sheet and toss with 0.5 tbsp of olive oil and the smoked paprika.
Roast the sweet potatoes for 20-25 minutes, flipping halfway through, until they are tender and caramelized.
While the potatoes are roasting, season both sides of the chicken breast with garlic powder, sea salt, and black pepper.
Heat the remaining 0.5 tbsp of olive oil in a heavy-bottomed skillet over medium-high heat.
Place the chicken in the skillet and sear for 6-8 minutes per side until golden brown and the internal temperature reaches 165°F.
In a small mixing bowl, whisk together the lemon juice and a tiny pinch of sea salt.
Place the arugula in a separate bowl and toss with the lemon dressing until lightly coated.
Slice the chicken breast into strips and serve immediately alongside the roasted sweet potatoes and the fresh arugula salad.