In a pot in low/medium heat add butter, garlic, ají amarillo, onion , pumpkins, potato, carrots oregano, let it cook until really tender, the longer you cook it the better.
Add half of the water, process it and pass it through a strainer.
Return the mix to the pot add the other half of the water, bring to a boil, then lower the heat and cook it until it has a creamy texture.
add evaporated milk, seasoning, turn it off, serve it with a piece good bread.