Add the onion and cook until just translucent, approximately 3-5 minutes.
Add the taco seasoning and cook until fragrant, approximately 1 minute.
Add the remaining ingredients to the pot. Bring to a simmer and reduce heat to medium low.
Let simmer for 20 minutes. Serve with taco toppings like sour cream, cheese, cilantro, jalapenos, tomatoes, and chips.
This soup is a very mild spice level. Make it spicy by adding cayenne pepper or hot sauce.Rotisserie chicken is perfect for this recipe. Any leftover or cooked-to-make chicken that is neutral or Mexican in flavor will work great.