Directions

1. Make the pork marinade: Process chile, garlic, onion, lime juice, vinegar, and oregano in a blender until smooth. Rub marinade all over the pork. Transfer pork to a dish, and cover with plastic wrap. Refrigerate overnight.
2. Preheat oven to 350 degrees. Heat a grill pan over high heat. Grill pork until seared on all sides, about 2 minutes per side. Transfer pan to the oven; cook until an instant-read thermometer inserted into center of meat registers 145 degrees, 20 to 25 minutes. Let pork stand at room temperature 5 to 10 minutes before slicing.
3. Meanwhile, make the salsa: Stir together the black beans, tomatoes, onion, cilantro, lime juice, chile, and cumin in a small bowl. Serve with the pork. Pork tenderloin is one of the leanest cuts of meat. Here, it's marinated in a chipotle blend, seared in a grill pan, and served with a fiber-rich bean and tomato salsa.