you can hold your hand 5 inches
above rack for 1 to 2 seconds. If using
a gas grill, preheat burners on high,
covered, 10 minutes, then reduce heat
to moderately high.
Grill potato skewers directly
over coals, turning over occasionally
with tongs, until grill marks appear,
3 to 4 minutes total.
Transfer potatoes to a platter
and drizzle with remaining 2 tablespoons oil.
Meanwhile, toss potatoes with
1 tablespoon oil and remaining teaspoon