boneless, skinless chicken breasts, cut into strips (about 0.5 kg) • plain yogurt (about 240 ml), juice of 1/2 lemon, 1 tablespoon vinegar • each of salt, black pepper, shawarma spice blend, and paprika • onion, sliced into thin strips; 2 bell peppers; 2 medium tomatoes • basmati rice (about 400 grams) • garlic cloves, finely chopped • each curry powder and kabsa spice blend • pita breads, cut into pieces