Spray the sheet pan with non-stick spray. Combine the melted butter, brown sugar, cinnamon and vanilla. In a bowl mix the butter mixture with the walnuts until evenly coated. Pour onto the greased sheet pan and bake for 5-7 minutes or until the walnuts become fragrant.
Remove from the oven and allow to cool completely.
Making the dressing
While the walnuts are cooling in a blender combine the olive oil, balsamic vinegar, honey, garlic, salt and pepper. Blend on high until everything is combined and the garlic has been blended.
Assembling the salad
In a mixing bowl toss the lettuce with about ¼-⅓ cup of the balsamic dressing and layer the lettuce then pears, walnuts, and gorgonzola. Add additional dressing to the lettuce if more is needed.