Bring a pot of water to boil.
Parboil sweet potatoes and brussel sprouts for about 3 minutes, then drain.
Mix all the ingredients for seasoning in a bowl.
Skewer the vegetables on the bamboo skewers.
Brush on seasoning onto one side of the vegetable skewers.
Heat grill pan on medium high, and lightly grease it with olive oil.
Grill vegetables seasoned side down for 4-6 minutes.
Brush on seasoning on the other side of the vegetable skewers.
When ready, flip and grill the other side for another 4-6 minutes.