Preheat your oven to 400°F (200°C).
Peel the kaukau (sweet potatoes) and cut them into bite-sized chunks.
In a large bowl, toss the kaukau chunks with vegetable oil, salt, black pepper, paprika, and dried thyme or rosemary. If using garlic, add it to the bowl as well.
Spread the seasoned kaukau chunks in a single layer on a baking sheet.
Roast in the preheated oven for 25-30 minutes, or until the kaukau is tender and lightly browned. Turn the pieces halfway through the roasting time to ensure even cooking.
Remove from the oven and garnish with fresh herbs if desired.
Enjoy your meal!