If using wooden skewers, soak them in water for a few hours before grilling.

Cut @chicken thighs{900%g} into roughly 1-inch pieces.
In a bowl, add the chopped chicken, @olive oil{125%g}, @salt{15%g}, @garlic cloves{30%g}, @oregano{5%g}, @black pepper{5%g}, @dijon mustard{100%g}, zest of @lemon{2}, and juice of a @lemon{30%g}. Mix well.
Cover and refrigerate to marinate for at least ~{30%minutes} and up to ~{24%hours}.
Preheat a #grill to 285°C.
Thread the marinated chicken onto skewers.
Grill the chicken skewers for ~{12-15%minutes}, turning occasionally, until well charred on all sides.

(Optional) Grill pita bread on the grill for ~{2%minutes} per side.