1. 1. Preheat the grill to medium-high heat.

2. 2. Season the prawns with salt and pepper, then grill for 2-3 minutes on each side until cooked through.

3. 3. Slice the zucchini, cucumber, radishes, and eggplant.

4. 4. Toss the sliced vegetables with olive oil, salt, and pepper.

5. 5. Place the seasoned vegetables on a baking sheet and roast in the oven at 400°F for 15-20 minutes, or until tender and slightly caramelized.

6. 6. Serve the grilled prawns with the roasted vegetables on the side.