Heat 1 tablespoon neutral oil in a wide pot over medium-high heat. Add the potatoes and season liberally with salt and pepper. Cook in the oil for 6–7 minutes, turning occasionally, until they just begin to soften.
Add the quinoa to the potatoes and cook for 1 minute.
Simmer the chowder:
Pour in 5 cups of water or vegetable stock and bring to a boil. Season with salt and pepper to taste. Once boiling, reduce heat to a hard simmer and cook for 20 minutes or until the quinoa is tender. If the soup is too thick, add the remaining 1 cup water or stock.
Finish the chowder:
Add the corn, cilantro, and cream to the soup and simmer for an additional 5–6 minutes. Taste and season with salt and pepper.
To serve:
Ladle the chowder into bowls. Garnish with jalapeño slices, a lime wedge, and a few more cilantro leaves if you like. Enjoy!