Cut the chicken breasts into bite sized cubes and place in a large ziploc bag
Add all of the remaining ingredients into the bag, seal and shake to ensure the chicken is coated. Place in the fridge to marinate for minimum 2 hours but preferably overnight.
If using wooden skewers, soak them in water for 15 minutes.
Preheat the grill to medium high heat.
Thread the pieces of chicken onto the wooden skewers. Place the skewers on the BBQ and spoon any of the remaining marinade from the bag over the chicken. Make sure you do this right after placing the raw chicken on the grill so there is no risk of cross contamination.
Cook the chicken for approximately 8-10 minutes turning frequently until fully cooked through. Serve the chicken with lemon wedges and tzatziki