Brown the beef in a large pot over medium heat. Break it into small pieces as it cooks and drain any excess fat.
Add the onion, peppers, and garlic. Cook until the vegetables soften and give off a sweet smell.
Pour in the diced tomatoes, tomato sauce, and beef broth. Stir to combine everything.
Season with paprika, oregano, salt, and pepper. Let the mixture come to a gentle boil.
Lower the heat and simmer for 20 to 25 minutes until the peppers are tender and the flavors blend.
Stir in the cooked rice. Let it warm through for 2 to 3 minutes.
Ladle the soup into bowls and top with parsley. Serve warm.