Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper to prevent sticking.
Wash the sweet potato thoroughly and slice it into even, long wedges; slice the chicken breast into thin strips of similar thickness.
In a large mixing bowl, toss the sweet potato wedges and chicken strips with the olive oil, sea salt, black pepper, smoked paprika, and garlic powder until evenly coated.
Arrange the chicken and potatoes in a single layer on the prepared baking sheet, ensuring there is space between pieces for maximum crispiness.
Roast in the center of the oven for 20 to 25 minutes, flipping the wedges and chicken halfway through, until the potatoes are tender and the chicken is cooked through.
While the meal roasts, finely mince the fresh chives and stir them into the Greek yogurt in a small serving bowl.
Remove the tray from the oven and serve the crispy wedges and chicken immediately with the chilled yogurt dip on the side.