Melt butter over medium heat and add walnuts to pan. Cook for 1-2 minutes to brown walnuts.
Pour walnuts and residual butter in bowl then toss with sugar mixture. Layout on a sheet pan lined with parchment paper and bake for 10 minutes in pre-heated 375-degree oven. Remove from oven and allow to cool for service.
Toss greens with dressing and place in center of chilled salad plate.
Arrange a half of sliced pear per plate fanned out from center of greens.
Place portion of crumbles on greens and pears followed by a portion of spiced walnuts then serve.