Directions:
Take olive oil in a saucepan and add to it mushrooms, onions, celery, and garlic. Cook for about 5 minutes over medium heat. Now add tomato sauce, salt, oregano, paprika, ground pepper, and basil. Bring it to a boil, cover it, and let it simmer for about 1 hour. The yummy sauce is ready to be poured on the meat balls.