Using a sharp knife make four long incisions in eaach chicken quarter.
make a course paste of the garlic, onion and chillies.
mix the lemon juice and the paste and salt and pepper in a bowl. add chicken and marinate for 30 mins.
now barbeque it. apply olive oil to the chicken while you barbeque it.
if you want to fry you can roll it in crumb and then in whipped egg and deep fry it in any other oil other than olive oil (olive oil is not very useful for deep frying).