In a medium bowl, add the sliced unpeeled pears; toss with lemon juice and honey; set aside.
Heat a dry non-stick pan, over medium heat; add the chopped walnuts; cook for 3 – 4 minutes until fragrant; remove from heat; set aside.
In the same pan, over medium heat, melt the butter.
Add the pears and cook for 5 – 7 minutes, turning occasionally, until softened and caramelized.
Arrange the arugula/spring mix/spinach on serving plates and top with the warm pears, crumbled blue cheese/gorgonzola/roqufort and toasted walnuts or pecans.
Serve immediately while the pears are warm and before the cheese begins to soften.