Caramelized Pear and Arugula Salad

1. Wash, core and quarter the brown pears.
2. Place the butter, vinegar and brown sugar in a nonstick skillet over medium heat.
3. When the butter is melted, add the walnuts and pears (flesh-side down) to the skillet and cook for 8 minutes, until the pears are just softened. Turn the pears halfway so that both sides of the flesh get browned.
4. Cut the blue cheese into slices or wedges.
5. Place the arugula or mixed greens on serving plates and top with the pears and walnuts. Spoon the pan juices over the salad and top off each plate with a slice or two of blue cheese.