Preheat a grill and smoker to medium.

Grind the coffee and dried mushrooms in a spice grinder, then rub it into the elk tenderloin. Grill the tenderloin over medium heat until medium-rare, and an instant-read thermometer registers 130 to 140 degrees F in the center, about 10 minutes. Set aside in a warming oven.

While the tenderloin is cooking, put the tomatoes on a sizzler or metal plate in a smoker for 10 minutes. Set aside.

Chutney: Put a saucepan over medium-low heat, and add the canola oil, onions, cherries, wine, stock, nutmeg, allspice and sugar. Cook for 30 minutes.

Grill the pancetta for about 5 minutes per side, brushing with garlic butter.

To assemble: Put an onion roll on each serving plate. Spread enough goat cheese on both halves to cover slightly. Slice the elk and put some on each roll bottom. Top each with a slice of pancetta, some arugula and heirloom tomato slices. Top with a dollop of chutney and cover with the top halves of the roll.