Roast the Pumpkin: Preheat oven to 200°C (180°C fan-forced). Line a baking tray. Cut pumpkin into 4 wedges (leave skin on). Place on tray, drizzle with oil, rubbing in to coat evenly all over and season well. Bake for 50-60 minutes, turning once, until golden and tender.
Make the Curry Sauce: About halfway through pumpkin cooking, heat oil in a medium pan over medium heat. Add curry paste and cook for 1 minute, until fragrant. Stir in coconut cream, kaffir lime leaves, and red chilli. Bring to a gentle boil.
Add fish sauce and brown sugar. Reduce heat and simmer for 15 minutes, until slightly thickened. Pour in coconut milk and simmer for another 5 minutes.
Finish & Serve: Stir green beans and pak choy into the sauce. Cook for 1-2 minutes until bright green and just tender.
Divide rice among bowls. Top each with a pumpkin wedge. Spoon the curry sauce and vegetables over the top. Garnish generously and serve immediately.