Step 1

Position rack in lower third of oven; preheat to 450 degrees F.

Step 2

Combine oil, chile-garlic sauce, soy sauce and white pepper in a large bowl. Add sweet potatoes; toss to coat with the seasoning mixture.

Step 3

Spread the sweet potatoes evenly on a rimmed baking sheet.

Step 4

Roast, stirring once or twice, until the sweet potatoes are tender and browned, 20 to 25 minutes.