Cut each steak into 4 long stips, giving you 8 in total. Divide the prawns into 8 portions and then thread the beef onto small skewers with the prawns and an occasional bay leaf.
Cut the peppers into large chunks along with the onions. Halve the tomatoes and quarter the mushrooms. Thread onto skewers with an occasional bay leaf
Cook the vegetable skewers on a griddle or on the bbq for between 25-40 minutes, brushing with the 3 tbsp of the Sweet chilli and coriander dressing as the vegetables cook
Brush the remaining dressing on the beef skewers with the dressing from the prawns and sear for 5 -10 minutes, turning occasionally and cooking until the prawns are pink and piping hot
To oven cook: Preheat the oven to 200 ℃, Fan 180 ℃, Gas 6. Roast the vegetables for 30 - 40 minutes, checking they are not over charring after 25 minutes.