Melt butter with oil. Add onions and leeks. Sweat until translucent. Add potatoes and stir.
Add the veggie broth and chili paste. Bring to boil, lower heat, simmer for 15 minutes or until potatoes are tender.
Pepper to taste, cool. Process until smooth.
Fold coconut milk and cream into potato soup base. Chill thoroughly.
Garnish with scallions and cilantro.