
Add the oil and onion to a soup pot and sauté it over medium heat for 5-7 minutes (it's ok if it lightly browns - more flavor!).
Stir in the garlic, followed by the broth, diced tomatoes, beans, green chilies, red bell pepper, and spices.
Increase the heat to high and bring the soup to a boil. Cover the pot with the lid slightly open, reduce the heat, and simmer for 8-10 minutes.
Using either an immersion blender or a regular blender, blend most of the soup (use caution - you may want to let it cool a bit first). You can blend it all, but I like to leave it a bit chunky.
Stir in the lime juice, and season with salt & pepper as needed (I found that I needed to add a fair amount of salt).
Serve as-is or with desired toppings.