In a large, 12" skillet, pour beef broth, spaghetti sauce, Italian seasoning, salt, garlic, and bay leaf and pasta. Stir a little to coat the pasta.
Bring the mixture to a boil. Reduce heat to low, cover and simmer for approximately 15 minutes, stirring at least once to keep pasta from sticking together.
Stir pasta and add frozen meatballs into the pan and press them down into the pasta. Cover and continue to simmer for about five minutes or until meatballs are heated through. Add 1/2 cup more liquid if needed.
Remove pan from heat and top with Mozzarella and Parmesan Cheeses. Cover for five minutes to allow the cheese to melt, or place under the broiler for a couple of minutes.