Preheat oven to 200??C (180?? fan forced). Line 2 baking trays with baking paper. Lightly spray breads with olive oil, and sprinkle with sumac and sea salt. Bake for 6 to 8 minutes, turning halfway, until crisp. Set aside. Break into pieces.
Meanwhile coat chicken in coriander and cumin. Season. Heat the oil in a large non-stick frying pan over medium-high heat. Cook tenderloins for 5 to 6 minutes, or until browned and cooked through. Set aside on a plate loosely covered with foil.
In a large bowl combine tomatoes, cucumber, capsicum, lettuce, bocconcini, herbs and bread. Season.
In a screwtop jar, combine lemon juice and zest, tahini, honey and 1Tblsp water. Season and shake well to combine.
Serve salad topped with warm chicken, and drizzled with dressing.