Heat olive oil in a Dutch oven, or large pot.
Add the onion and garlic to the pot. Cook until the onion has softened.
Then, add in the ginger and red chili paste, cooking for about a minute.
Add the cilantro and lemongrass. Then, stir in the pumpkin puree, vegetable broth, and lime juice.
Bring the pot to a boil, then lower it to a simmer, letting it cook for 30 minutes.
Allow the soup to cool down a bit, then use a hand blender to blend the soup.
Once soup is blended, stir in the coconut milk and allow soup to simmer again for 15 more minutes.
Spoon soup into bowls. Drizzle coconut milk over the soup. Top with fresh cilantro, sliced chili pepper, and pumpkin seeds.