Step 1

If using the OVEN: preheat the oven to 425 degrees F. If GRILLING: prepare the grill to medium-high (450 degrees F.)

Step 2

Cut 5 large sheets of heavy duty foil (about 12-inches wide by 18-inches long.) Coat foil generously with nonstick cooking spray.

Step 3

In a large bowl, toss together all the ingredients (except the butter.)

Step 4

Divide mixture evenly into 5 equal portions and add to the center of each sheet of foil. Place 1 tablespoon butter on top of each.

Step 5

To seal the foil packet, bring the short sides together in the middle and gently fold down over the ingredients, leaving a little space for steam. Then roll up the ends to seal closed.

Step 6

Place foil packets on the grill and cook for 25-30 minutes (flipping halfway through), OR bake in the oven for 30-35 minutes until veggies are tender.

Step 7

(Test only 1 packet at a time; every time the packets are opened, the steam is released so it will take longer to cook.)

Step 8

Serve immediately and enjoy.