In a mixing bowl, combine the chicken with yogurt, spices, and a pinch of salt. Cover and refrigerate for at least 1 hour, or overnight for best results.
In another bowl, mix the Greek yogurt, finely chopped cucumber, diced red onion, mint, ground cumin, Kosher salt, and cayenne pepper. Stir well to combine and refrigerate until ready to serve.
In a mixing bowl, combine the whole wheat flour and a pinch of Kosher salt. Add vegetable oil and gradually mix in water until a dough forms. Knead the dough for a few minutes until smooth. Cover and let it rest for at least 30 minutes.
Preheat your grill or skillet over medium-high heat. Cook the marinated chicken pieces for about 5-7 minutes on each side, or until fully cooked and charred. Let the chicken rest for a few minutes before slicing it into bite-sized pieces.
Divide the dough into small balls. On a floured surface, roll each ball into a thin circle. Heat a skillet over medium heat and cook each chapati for about 1-2 minutes on each side, until puffed and lightly browned. Brush with ghee or vegetable spray for extra flavor.
To assemble, place a generous scoop of chicken on a chapati, drizzle with raita, and top with sliced red onion, jalapeƱos, and chopped cilantro. Squeeze fresh lime juice over the top for a zesty finish.