In a medium bowl combine turkey and a large pinch of salt and a few cracks of pepper. Mix together and divide into 8 even balls. Set aside.
In a small bowl combine spinach, peppers, red onion, parsley, olives and tahini.
Flatten each ball of turkey, scoop 1 heaped tablespoon of the mix onto 4 of the patties. Top each one with another patty and pinch the outside to create a larger patty. Grill on medium high for 4 minutes on each side until cooked through.
To make tahini sauce: combine 2 tablespoons tahini with apple cider vinegar and enough water to reach the consistency you like (i use about 2-3 tablespoons). Season with salt and pepper.