Stuffed Pepper Soup

In a large pot over medium heat, heat oil. Add bell peppers and onion and cook until soft, 7 minutes. Add garlic and cook until fragrant, 1 minute. Add ground beef and season with salt and pepper. Cook until no longer pink, 7 minutes. Drain fat and return to heat.  Add broth, crushed tomatoes, diced tomatoes, and oregano. Bring to a boil then reduce heat to a simmer. Add rice and simmer, covered, until rice is tender, about 40 minutes, adding water if necessary.  Season with salt and pepper to taste.