Place the Greek yogurt in a small bowl and add the crushed garlic.
Chop the onion and add it to the yogurt mixture.
Chop the herbs and mix into the marinade.
Season well with salt and pepper and stir.
Add the meat to the marinade and toss to coat.
Cover with cling film and set aside in the fridge for at least 6 hours.
Combine the breadcrumbs with the grated parmesan.
Coat the meat with the breadcrumbs - parmesan mixture.
Heat the vegetable oil and place the chicken in the pan.
Cook for 4-5 minutes on each side.