Add the diced pumpkin to the pot and cook for another 5 minutes, stirring occasionally.
Pour in the vegetable broth and coconut milk, then add the ground cumin, coriander, ginger, cayenne pepper, salt, and pepper. Stir to combine.
Bring the soup to a simmer, then reduce the heat to low and cover. Let it cook for about 20-25 minutes, or until the pumpkin is tender.
Using an immersion blender, blend the soup until smooth and creamy. Alternatively, transfer the soup in batches to a blender and blend until smooth. Be careful as the soup will be hot.
Taste and adjust seasonings if needed.
Serve the creamy pumpkin and coconut soup hot, garnished with fresh cilantro and toasted pumpkin seeds.