Scallion Sweet Potatoes (on the Grill)

Combine sweet potatoes, scallions, garlic and thyme in a bowl. Drizzle with olive oil and season with salt and pepper; toss to coat. Place sweet potatoes on a large sheet of foil and fold up around, sealing any edges. Grill over low heat until the potatoes are tender, 25-35 minutes. {I would check these every so often since cooking times can vary depending on the temperature of your grill.}