Add the tomatoes to the pot and continue to cook until tomatoes are soft.
Add water to the pot, a tablespoon or more of Better Than Bouillon, Chicken (or Vegetable if you want to keep this vegetarian). Bring to a boil. Add the dried tortellinis. Continue to simmer/boil until the tortellinis are puffed up and soft. If you are using fresh tortellinis this will only take a couple minutes after the pot comes to a boil. If you are using dried tortellinis this will take about 10 minutes. Don't overcook; you don't want them mushy and falling apart.
While they cook, roughly chop the spinach. Add spinach to the soup pot and stir in to combine. Turn off the heat at this point so the spinach does not overcook.
You're done! Ladle into bowls and serve. Shake some hot pepper flakes on top if desired.