Step 1
Preheat the oven to 200°C/fan oven 180°C/ Gas Mark 6. Put the Trex into a large roasting tin and heat in the oven until melted.

Step 2
Add all the vegetables to the roasting tin and toss to mix and coat lightly in the Trex. Season with salt and freshly ground black pepper, then add the cumin seeds, garlic and chilli. Roast for 45-50 minutes, turning the vegetables halfway through the cooking time. Check that the vegetables are tender, allowing a few more minutes, if necessary.