Cook the frozen meatballs according to the package instructions. Set aside.
In a large glass measuring cup or bowl, whisk together the beef broth, heavy cream, Worcestershire sauce, cornstarch, garlic, parsley, salt, thyme, black pepper, and nutmeg.
Pour the sauce mixture into a large skillet and bring to a simmer over medium heat, stirring often.
Simmer until the sauce slightly thickens, about 5 minutes.
Add the cooked meatballs to the skillet and stir to coat.
Simmer for an additional 5–10 minutes, until the meatballs are heated through.
Serve warm over egg noodles or mashed potatoes.