Toss squash and peppers in 2 Tbsps of oil and season with salt and pepper. Spread on parchment-lined baking trays. Smoke vegetables for 90 minutes.
Heat the remaining 1 Tbsp of oil over medium heat in a stock pot. Gently cook leeks until tender, about 3-5 minutes. Add garlic and cook for another 2 minutes. Add squash, pepper, vegetable stock, and aji amarillo paste to the pot. Bring to a boil and simmer for 30 minutes. Remove from heat and let cool.
Place soup in a blender. Add coconut cream and puree until smooth. Return soup to pot and reheat to desired temperature.
Notes
The number of servings depends on whether you are serving it as an appetizer or main.