Take the pork tenderloin and cut it in half crosswise. Each piece should be about 8 ounces. Season with salt, pepper, cumin, paprika and Szechwan pepper. Heat 2 tablespoons of lard in a saute pan. Sear the pork tenderloins in the hot lard, browning all sides. Place pork on a plate and let cool. In the same saute pan, saute the mushrooms, adding the remaining 1-tablespoon of lard if necessary. Cook until the mushrooms are brown and all the moisture is gone. Season with salt, pepper and Creole mustard. Let cool. Melt unsalted butter. With pastry brush, brush butter on each sheet of dough and layer the phyllo, one sheet on top of the other. Cut the buttered phyllo stack in half lengthwise. Place four tablespoons of mushroom mix on phyllo dough, spread into a layer. Turn the dough so it looks like a diamond. Place the tenderloin onto the mushroom mixture where the edges of the loin are about 1/2 inch from the edge of the phyllo. Fold the nearest corner of phyllo over the loin, and then bring up the corners on the sides of the loin, towards the center of the loin. Roll the loin away, wrapping up the whole loin. Roast in a preheated 450-degree oven for 18 to 20 minutes.
Recipe courtesy of Le Cou Rouge, Nashville,TN