Step 1 Preheat oven to 240°C. Line 3 baking trays with baking paper. Place pizza bases on 2 of the prepared baking trays.
Step 2 Place pumpkin slices, in a single layer, on remaining tray. Spray pumpkin with cooking oil and bake for 15–20 minutes, or until tender and golden.
Step 3 Meanwhile, set a large non-stick frying pan over medium heat and spray with olive oil. Cook onion, stirring, for 10–15 minutes, or until golden and caramelised.
Step 4 Spread tikka-masala simmer sauce onto pizza bases, then top with roast pumpkin, onion and prawns. Bake for 8–10 minutes, or until prawns are pink and cooked through. Combine yoghurt and 2 tablespoons water in a small bowl. Drizzle pizzas with yoghurt mixture, then scatter with half of the coriander.
Step 5 Place cucumber, salad greens and remaining coriander in a medium salad bowl; toss lightly. Serve pizza slices with salad.