If using fresh pumpkin: Preheat the oven to to 180 ºC or 350 ºF. Cut pumpkin in halves and remove seeds. Put two halves in a baking dish or tray, drizzle with olive oil and sprinkle with salt and pepper. Roast for 30 minutes or until tender.
Toast pumpkin seeds in a dry frying pan for 2-3 minutes. Finely chop parsley and garlic. Combine with pumpkin seeds, 2 tablespoons olive oil, pumpkin seed oil, salt and black pepper. Set aside.
Slice mushrooms and an onion. Heat a large skillet or pan and add a lug of olive oil. Fry mushrooms and onions over medium-high heat until golden (about 3-4 minutes), stirring occasionally. Add chopped rosemary, crème fraîche and mix well. Cook for 2-3 more minutes.
Boil your milk with salt, pepper and grated nutmeg in a pot or microwave.
If using pumpkin puree: complete steps 2-4. Heat the pumpkin puree in the microwave, then combine with milk.
Arrange pumpkin puree and mushroom on plates and pour some pumpkin oil on top.
Enjoy!