To prepare a vegetarian tortilla soup recipe, first you need to prepare your ingredients. First, you'll need your tortillas. You can use any type of tortilla you like, as long as it's not too mushy. If you don't have any, then you can just use your favorite refried beans. Then, add your vegetables to the pot and cook them until they're tender, about 10 minutes. Add your seasonings, and mix everything together until everything is evenly combined. Now that you have the ingredients, cook the soup on medium-high heat until the vegetables are tender and the meat is no longer pink in the center. This should take about 5 to 6 hours, depending on the size of your pot. Once the time is up, turn the heat down to low and simmer for 10 to 15 minutes, or until all of the liquid has been absorbed. Serve with sour cream and guacamole, if desired.