In a jar, mix together dressing ingredients and refrigerate until use. Combine sugar and walnuts in a heavy skillet. Cook slowly over medium-low heat, stirring often until sugar has melted into the walnuts and they are brown. Remove nuts from pan and cool. To make salad: Combine greens, apple smoked turkey and red onions. Toss gently with curry dressing. Portion walnuts into plates and sprinkle with walnuts.