Preheat grill to the lowest heat setting available.Evenly distribute the olive oil to the bottom side of each piece of naan and use your hands to rub it in and coat each piece very well.Evenly distribute the marinara sauce to the top side of each piece of naan.Evenly sprinkle the cheese to each piece of naan.Evenly distribute the pepperoni to each piece of naan.Oil the grill grates and place the naan onto the grill, close the lid, and allow the pizza to cook for about 4 to 5 minutes, or until cheese has melted. Make sure your grill is on the lowest possible heat setting or the bottom of the naan will char before the cheese melts. Check early and often so they don’t burn since all grills and ingredients vary.Remove pizzas from the grill, optionally garish with herbs, and serve immediately. Pizza is best warm and fresh.