Begin by cutting each chicken breast into five pieces and placing them in the jar.
Then cut the onion into quarters and separate the layers. Now cut the deseeded pepper into eight pieces and add these to the jar along with the chopped herbs, bay leaves, lemon and peppercorns. Now crush a clove of garlic and add this, too, plus the other clove, cut in half. Next, pour in the vinegar followed by the oil, put the lid on the jar and give it a really good shake. Leave it in a cool place overnight and give it another good shake in the morning before you go out.
Before cooking the chicken, if you are using wooden skewers you need to soak them for 30 minutes in hot water (to prevent them from burning), then pre-heat the grill to its highest setting for 10 minutes. Then thread a bay leaf on to each skewer, followed by a slice of lemon. Then alternate the chicken pieces with pepper and onion, finishing up with half a clove of garlic and the other slice of lemon. Add a seasoning of salt and pepper, and then lay the skewers on a grill rack, skin side up, with a dish below to catch the juices.
Position them about 4 inches (10 cm) from the source of heat, then grill - turning once and brushing frequently with the marinade - for 20 minutes.
These are very nice served with rice and a mixed lettuce and rocket salad.