1.Preheat oven to 200°C/180°C fan forced. Place pumpkin on a baking tray. Spray with oil. Bake for 20 minutes or until just tender.
2.Meanwhile, whisk eggs, cream, thyme and 1/3 cup of cheese in a medium bowl. Season with salt and pepper.
3.Place bread pieces in a 2-litre (8-cup) ovenproof dish. Add two-thirds of the pumpkin, two-thirds of the zucchini and two-thirds of the tomato. Toss to combine. Pour egg mixture over vegetable mixture. Top with remaining pumpkin, zucchini, tomato and cheese. Stand for 5 minutes.
4.Bake for 20 minutes or until set.
Use 2 medium regular tomatoes instead of cherry tomatoes. For a meaty version, add shredded barbecue chicken.