In a medium pot, add the contents of the tomato paste can(s), the vegetable bouillon, onion powder, garlic powder, sugar, and thyme.
Stir in the water a little at a time. This prevents the paste and powdered spices from getting clumpy. Continue to add water until you've reached the desired thickness for the soup. If you are using butter, add it now.
Set over medium heat and bring to a soft boil. Cook for at least 10 minutes, stirring occasionally.
Remove from heat and serve.