You’ll need heavy duty foil for this dish. If you don’t have that, try doubling regular foil.
Spread a large piece of foil on the counter (about 15 inches long). Spray with cooking spray.
Place the tilapia in a single layer on the foil.
Lightly sprinkle with lemon pepper.
Cover with the veggies and sprinkle more lemon pepper using as much or as little as you like.
Rip off another piece of foil, about this same size as the first and cover the fish and vegetables. Fold all of the sides of the foil together so you end up with a loose packet.
Slide the packet onto a cookie sheet or cutting board to transfer it to the grill.
Cook over low to medium heat for 15-20 minutes.