Pre-heat oven at 180°C (350°F) forced fan, line a tray with baking paper.Peel and chop pumpkin, toss with coconut oil and roast till golden.Heat coconut oil in a large pot (medium heat), then fry shallots till golden, add cumin and coriander seeds and cook for a bit longer till fragrant.Add lemongrass, ginger, turmeric, chilli and kaffir leaves, cook another minute – but don’t burn!Add roasted pumpkin and stock, cover and bring to a boil, then let simmer for ten minutes. Add coconut milk, then turn up the heat and let it bubble away uncovered till it reduces down slightly for about 5-10 minutes.Once cooked, remove from heat and let cook a little, then blend till smooth and serve with fresh coriander and a squeeze of lime.