Use Your Oven
Heat oven to 450°F. Assemble foil packets as directed; place on baking sheet. Bake 45 min. to 1 hour or until ribs are done. Remove ribs from foil; discard foil. Place ribs on rack of broiler pan. Heat broiler. Broil ribs, 6 inches from heat, 10 min., turning every 5 min. and brushing with sauce.
Don't have heavy-duty foil? Use a double-layer of regular foil instead.
Substitute 3 to 4 ice cubes to each packet instead of the water.