Trim the pork to cut unhealthy saturated fats. Mustard greens and pears are a great source of dietary fiber.
Sprinkle pork with black pepper. Heat a nonstick skillet coated with cooking spray over medium-high heat. Add pork, and cook 2 minutes, or until browned, turning occasionally. Cook 5 additional minutes, or to desired degree of doneness; remove from heat. Keep warm.
Combine scallions, lime juice, olive oil, honey, and salt in a small bowl; stir well with a whisk. Place greens, dates, and pear in a large bowl; drizzle with dressing, and toss gently to coat. Cut pork diagonally across the grain into thin slices. Divide salad among each of 4 plates; top with pork.