Mix together beef broth, salsa, 1 onion, tomatoes, dried basil, oregano, and 1/4 teaspoon pepper.
(If you use condensed beef broth [e.g., Campbell's], eliminate the salt in the meatballs and use 5 cans [10.5 ounces each] broth plus one quart water.) Bring to a boil and simmer 20 minutes.