Grilled Pork Tenderloin

In a small bowl, whisk lemon zest, brown sugar, paprika, cumin, and salt. Stir in oil to create a paste. Spread paste all over pork.

Prepare a grill for medium-high heat; preheat 5 minutes, or heat a grill pan over medium-high heat. Grill pork, turning occasionally with tongs, until charred and an instant-read thermometer inserted into thickest part registers 145°, about 20 minutes. (For larger tenderloins, bake in a 400º oven until desired temperature is reached, 15 to 25 minutes more.) Let rest 10 minutes. 

In a medium bowl, stir scallions, parsley, oil, garlic, vinegar, oregano, and red pepper; season with salt and black pepper. 

Slice pork and arrange on a platter. Spoon herb sauce over top to serve.