Preheat grill to MEDIUM-HIGH heat or GRILL ZONE (ORANGE).
Place potatoes, leeks, oil, rosemary, salt, pepper and garlic on large sheet of foil. Bring up sides of foil; double fold at top and ends, leaving room for heat circulation inside.
Grill packet in covered grill, 25 to 30 minutes or until potatoes are tender.
Preheat grill to MEDIUM-HIGH heat or GRILL ZONE (ORANGE).
Place potatoes, leeks, oil, rosemary, salt, pepper and garlic on large sheet of foil. Bring up sides of foil; double fold at top and ends, leaving room for heat circulation inside.
Grill packet in covered grill, 25 to 30 minutes or until potatoes are tender.