Light your grill and get it warming up.
Wash the potatoes and slice thinly
Place sliced potatoes in a bown and add Grlic Olive Oil. Toss gently.
Add Salt, Pepper, Onion Powder and Rosemary. Toss gently.
Line baking sheet with aluminum foil. Arrange potatoes on the sheet in as close to a single layer as you can.
Place the baking sheet with the potatoes on the grill. Close the lid and turn heat to medium.
Turn the potatoes every 10 minutes for 30 minutes, or until they are done the way you like them.