Add the mini meatballs, chicken broth, marinara sauce, bay leaf, Italian seasoning and minced garlic to a large stock pot or Dutch oven.
Stir to combine.
Bring the mixture to a boil over medium-high heat. Once boiling, cook for 5 minutes to heat the meatballs through.
Stir in the spaghetti noodles, broken into 1½-inch pieces.
Reduce the heat to low and simmer for 10-12 minutes, stirring occasionally, until the spaghetti is tender.
Remove and discard the bay leaf.
Ladle the soup into serving bowls and top each serving with the grated Parmesan cheese. Serve warm and enjoy!
Notes
Refrigerate the leftovers in an airtight container for up to 5 days. You can use beef broth or vegetable broth instead of the chicken broth if you prefer.