Wash courgette and pepper and wipe mushrooms. Cut into bite sized chunks.
Peel onion and cut into bite sized wedges.
Place vegetables in a bowl with the oil, herbs and seasoning and mix thoroughly.
Thread onto skewers and cook under a pre-heated grill or on a BBQ for 7 minutes, turning once until the edges are curled and the vegetables are tender but still with a little "bite."
Combine mint and yoghurt to serve as accompaniment.