Preheat oven to 450 degrees and heat a grill to medium-high. Line a baking sheet with aluminum foil. Season grapes ... each of salt and pepper. Thread vegetables onto skewers and grill, turning ...
Wrap the foil on all four sides to form a package, and seal well. Repeat with remaining packages. Poke holes in the top of each to allow steam to escape. Place the packages on a medium-hot grill ...
Pinch the ends closed, and fold once or twice to seal tightly. Move the coals to one side of the grill. Transfer the foil packets to the grill away from hot coals, cover the grill, and cook for 15 ...