Turkey Salad with Mandarin Oranges

1 c freshly squeezed orange juice

1/3 c red wine vinegar

2 tbsp poppy seeds

2 tbsp olive oil

1 tbsp Dijon mustard

1/2 tsp black pepper

20 c red leaf lettuce, washed, dried, chilled and torn

8 c baby spinach leaves, washed, dried, chilled and torn

2 lbs COOKED TURKEY BREAST, cut into 1/2-inch julienne

40 oz mandarin oranges, drained

Orange zest As needed