I happened to throw this together one night for camping, and it was such a hit that I made the same thing for a large cookout at home. Just double the ingredients for the number you wish to serve. You can fit two tenderloins in one large bag.
No fuss, easy clean-up!
• 1 pork tenderloin • 1 package onion soup mix • 2 tablespoon olive oil • 2 apples, sliced and peeled • 1/2 medium onion, sliced • 1/2 cup water • terriyaki sauce
Instructions: Put all ingredients in a Reynolds brand Hot Bag (aluminum foil bag). Cook on a grill (top rack) 1 1/2 hours or on a hibachi 1 hour. Be sure to turn it over approximately every 15 minutes.
If liquid boils out, add more water to prevent drying out. Tender enough to cut with a plastic knife!