Preheat the oven to 350°F (180°C).
Arrange the pumpkin, onion, garlic, ginger, and tomatoes on a baking tray.
½ pumpkin, 1 medium onion, 4–5 garlic cloves, 1- inch piece fresh ginger, 4 medium tomatoes
Drizzle with olive oil and coat the vegetables.
1–2 teaspoons olive oil
Roast for 15–20 minutes, then check the vegetables.
Remove the onion, tomatoes, garlic, or ginger early if they are tender.
I kept my ginger and garlic till the end, as they were big.
Keep roasting the pumpkin until a knife passes through easily and the edges are browned.
The total time will depend on the size of the pieces.
Let the vegetables cool.
Remove the garlic skins if you want, and any tough pumpkin rind.
Transfer the vegetables to a blender.
Add a little water and blend until smooth.
Water
Add more water gradually until the soup reaches your preferred thickness.
Blend in batches if needed, and avoid blending steaming-hot vegetables in a sealed blender.
Pour the soup into a saucepan.
Add salt to taste, bring to a boil, then reduce the heat and simmer briefly, stirring.
Salt
Serve warm with optional cream and freshly crushed black pepper.
1 tablespoon fresh cream, Freshly crushed black pepper