In a small skillet, melt butter over medium heat. Add walnuts; cook until toasted, about 4 minutes. Sprinkle with sugar. Cook and stir until sugar is melted, 2-4 minutes. Spread on foil to cool.
In a large bowl, combine the salad greens, turkey, onion, pepper, tomatoes, noodles and sugared walnuts. In a blender, combine the remaining ingredients; cover and process until smooth. Pour over salad and toss to coat.