Take chicken in bowl and mix all the ingredient of marinade in it. Set aside for 20 -30 minutes.
Transfer chicken in a pan. Cover and cook chicken on medium heat for 10 minutes until tender. Then remove lid and burn any excess water. We need dry but moist chicken.
Mix all the ingredients for veggie filling in a large mixing bowl and set aside.
Now mix all the ingredient of dip sauce in a bowl, set aside.
To Assemble
To serve, open a pita pocket and fill it with the veggie filling first. Then top it with Tzatziki sauce.
Now add the chicken filling and top it with dip sauce. Add olive slices and jalapenos (if using) and serve.