1. Combine 2 tablespoons oil, 1/4 cup parsley, 1/3 cup cilantro, cumin, and red pepper in a shallow dish. Add pork. Cover with plastic wrap, and refrigerate 1 hour, turning once.
2. Preheat grill to medium-high.
3. Sprinkle pork with 1/2 teaspoon salt and black pepper. Place pork on a grill rack coated with cooking spray, and grill for 8 minutes. Turn pork over, and grill 7 minutes or until a thermometer registers 145°. Remove pork from grill. Let stand for 5 minutes. Slice pork crosswise.
4. Combine 3/4 cup parsley, 1/3 cup cilantro, 1/4 teaspoon salt, oregano, and remaining ingredients in a food processor; pulse 10 times. Drizzle 1/4 cup olive oil through food chute with food processor on. Serve with pork.