Roast the Pumpkin:
Preheat oven to 180°C. Toss pumpkin and parsnip with olive oil, curry powder, cumin, and salt. Roast for 45 minutes until tender.
Prepare the Base:
In a large pot, heat butter and remaining olive oil. Sauté onion, garlic, and ginger until golden. Add carrots, celery, rice, apples, cardamom, and turmeric. Cook for 5 minutes.
Combine Ingredients:
Mash the roasted pumpkin and parsnip into the pot. Stir in stock, coconut milk, and tomatoes. Simmer until rice is tender (about 20 minutes).
Finish & Serve:
Add mango chutney, lemon juice, and adjust seasoning. Garnish with fresh coriander and black pepper. Serve hot with naan or crusty bread.