Grilled S’mores Pie

1. Open bottom and top vents of a ceramic grill such as a Big Green Egg completely. Light charcoal briquettes in firebox of grill; when briquettes are covered with gray ash and flames have subsided, spread briquettes into an even layer. Wearing heatproof oven mitts, place indirect heat plate and grate in grill. Close lid, and preheat to 300°F, adjusting top and bottom vents as needed.

2. Line a 12-inch cast-iron skillet with 4 layers of aluminum foil; set aside.

Prepare the Crust:

1. Pulse graham crackers in a food processor until finely ground, 10 to 18 pulses (you’ll have about 1 3/4 cups plus 1 tablespoon ground). Add butter, sugar, and salt; pulse until mixture is combined and consistency of wet sand, about 5 pulses, stopping to scrape down sides of bowl as needed. Press mixture into bottom and up sides of a 9-inch aluminum pie pan. Place pie pan in a separate 9-inch aluminum pie pan; place double-stacked pie pans inside prepared skillet.

Prepare the Filling:

1. Place chocolate in a large heatproof bowl; set aside. Bring cream to a simmer in a small saucepan over medium, stirring often. Remove from heat, and pour over chocolate in bowl. Let stand, undisturbed, 5 minutes; whisk until melted and smooth. Whisk in eggs, vanilla, and cayenne until smooth. Pour Filling into prepared Crust.

2. Place pie in skillet in preheated grill; cover and cook until Filling edges are set and puffed and center is just set but still slightly underdone (an instant-read thermometer inserted in center should register 182°F to 185°F), 50 minutes to 1 hour, adjusting vents as needed to maintain 300°F. Avoid opening grill lid too many times, so the grill doesn’t lose heat.

3. Remove skillet from grill; carefully remove double-stacked pie pans from skillet, and transfer to a wire rack. Let cool 30 minutes. Transfer pie and wire rack to refrigerator; chill until set, about 40 minutes. 

4. After pie has chilled, open vents of grill to increase temperature to 425°F. Return pie to skillet, and top with marshmallows. Return skillet with pie to grill; close lid, and cook until marshmallows are golden and toasted, 10 to 15 minutes, adjusting vents as needed to maintain temperature.

5. Remove skillet from grill. Transfer to a wire rack, and let cool 5 minutes. Slice with a knife and serve (a silicone pie server works well here). Leftover pie may be stored in an airtight container in refrigerator 3 to 4 days."