Whisk together all vinaigrette ingredients until well blended; set aside.
In a small frying pan set on a medium heat, melt the butter, stir in the maple syrup or honey and then stir in the walnuts. Continue to heat the walnuts, stirring continuously, for approximately 2-3 minutes or until they are fragrant, caramelized and lightly browned. Remove from the heat; set aside.
Place the greens in a large salad bowl or, if individual servings are preferred, distribute them equally among 6 salad plates. Sprinkle over the pears, blue cheese and walnuts. Place over chicken then drizzle with dressing and toss.
Note: I find having the chicken warmed is superior to cold chicken.