Mix together all ingredients for the meatballs. Set aside.
Drizzle olive oil into the bottom of a large skillet or pan over medium-low heat.
Using a tablespoon scoop or spoon, form meatballs from the ground beef mixture. Drop into the heated skillet, turning occasionally to ensure that all sides of the meatball have been browned, about 7 minutes.
Add tomato sauce and oregano to the pan with the meatballs and reduce heat to a low simmer. Allow to simmer for about 5 minutes.
For the soup:
Add all ingredients to the pan with the meatballs. Simmer over low-medium heat for 15 minutes.