Saute onion in olive oil until tender. Add in tomato paste, garlic, ginger, coconut milk, pumpkin, and broth. Combine until heated through. Season with salt & pepper.
Place mixture into Vitamix or blender and add lemon juice, chilies, cayenne, and salt & pepper. Blend until smooth, 1-2 minutes.
Pour into soup bowls and garnish with fresh cilantro and scallion.