Turn on the gas grill to low heat with very little visible flame.

In a cake pan or disposable aluminum cake tin (recommended for easy clean-up), evenly distribute the milk chocolate bar pieces.

Dollop the peanut butter on top of the chocolate, about a tablespoon at a time.

Place directly on the grill over indirect heat and flames.

Set timer for exactly 1 minute - this will not take long - then remove from heat.

The chocolate and peanut butter should be melted, and you can swirl them a bit with grill tongs, if desired.

Top with marshmallows, and return to the grill over indirect heat and flames for 1-2 minutes, or until marshmallows are golden brown and melted.

Serve with graham crackers for dipping. Enjoy!