Unless you go throwing in cheese or sour cream, the whole recipe is vegan! (and gluten-free, and, obviously, vegetarian)
This is a very flexible soup recipe. I've listed the scallions as optional, or you could use them instead of red onion. I love onion, so I used both. If spice isn't your thing, replace one or both of the poblanos with green bell pepper. If spice
is your thing, add another jalapeno or up the quantity of spices. If you're really feeling adventurous, hit the whole thing with an immersion blender for a smooth soup. Have fun with it, and let me know your changes and how they worked in the comments!
When mixed with lime juice in the salsa, the Granny Smith apple lasts several days in the fridge without browning, so feel free to make it in advance.
Adapted from
Bon Appetit, January 2012.