Preheat the oven to 400°F (200°C).
Wash and peel the sweet potatoes.
Cut the sweet potatoes in half lengthwise.
Drizzle olive oil over the cut sides.
Sprinkle salt, pepper, and garlic powder evenly.
Place the sweet potatoes cut-side down on a baking sheet.
Roast in the preheated oven for 30-40 minutes, until tender.
Check for doneness by piercing with a fork.
Remove from the oven and let cool slightly.
Serve warm, garnished with herbs if desired.