1.Tear off a 36x18-inch piece of heavy-duty aluminum foil. Fold in half to make an 18-inch square. Fold up sides, using your fist to form a punch.
2. Place one 10-oz. package frozen vegetables in center of pouch. Season with salt and pepper; top with a pat of butter or margarine.
3. Fold edges of foil to seal pouch securely, leaving space for expansion of steam.
4. Grill over medium-hot until vegetables are cooked.
Note: Allow about 20 minutes for peas and other small vegetables; allow more time for larger vegetables. Turn the package of vegetables frequently.