I used to go to a local Mexican restaurant all the time for this soup. I finally decided I needed to learn to make it because eating out was costing me way too much ;) I looked through several recipes for the soup, combined some, and then tweaked until I came up with a recipe that was close to that of my favorite Mexican place. This is quick and easy and I usually get rave reviews when I make this for a crowd. I hope you enjoy it! :)
PS. This soup has a mild heat. If you like it spicier, add a can of chopped chilies or a diced jalepeno. I've also substituted the Rotel tomatoes with a really good chunky salsa when I couldn't find them. And I like to garnish with a lime wedge.