In a large bowl, stir together the rice and hot water. Allow to sit until the rice has absorbed the water. Fluff the rice with a fork.
Spoon rice onto the centers of 6 large sheets heavy-duty foil. Top with chicken, artichokes and tomatoes; drizzle with combined dressing and pesto.
Bring up foil sides. Double fold top and both ends to seal each packet, leaving room for heat circulation inside. Place on a 15x10x1-inch pan.
Bake 30 to 35 minutes or until chicken reaches 165 degrees in the center. Remove packets from the oven or grill; let stand 5 min. Poke holes in foil to release steam before opening.