Peel the sweet potatoes
Cut the sweet potatoes into wedges
Soak the wedges in a bowl of cold water for 30 minutes
Mean while, mix all the spices together
Preheat the barbecue to 350°F
Drain the sweet potatoes and pat dry with paper towel
Place sweet potatoes in a large bowl
Add spices to the sweet potatoes
Drizzle the olive oil over the sweet potatoes and toss to coat
Place on grill and cook for 10-15, turning every 3-4 minutes, until cooked though
Remove from grill and serve