Preheat the barbecue for medium heat if using a gas barbecue.
Thread the vegetables alternately onto the skewers.
Mix the oil, garlic and seasoning in a bowl and then generously brush over the skewers
Brush the cooking grate with oil and place the kebabs on the barbecue.
Baste frequently with the oil mixture.
Cook for about 8 to 10 minutes, or until the courgettes are tender and thoroughly cooked.