Add tomato paste and oregano and stir until the onion is coated, continuing to cook over medium heat for 2 minutes. Add vegetable broth and tomatoes and bring to a simmer. Simmer for 15-20 minutes.
Add tomato paste and oregano and stir until the onion is coated, continuing to cook over medium heat for 2 minutes. Add vegetable broth and tomatoes and bring to a simmer. Simmer for 15-20 minutes.