In a blender combine apple cider vinegar, lemon juice, olive oil, honey, dijon mustard and onion. Blend on high until smooth.
Then add in a pinch of salt and poppy seeds and blend for another couple seconds just to combine. Add lettuce to a mixing bowl and toss with a few tablespoons of the dressing (you won't use it all!).
Top with apples, chicken, pomegranate seeds and pistachios. This serves 2 people but feel free to add more toppings and dressing to serve a crowd!