Lop the heads off the garlic, and give each a light drizzle. Dust lightly with some salt & pepper.
Place into smoker at 225F for about 2-2.5 hours, until garlic squeezes easily from the bulb.
Place cloves in dehydrator and grind when dried (took me about 24 hours, your mileage may vary)
Either auto grind or mortar/pestle to desired coarseness.