Place frozen meatballs on a baking tray and cook in the oven according to the directions on the package.
In a large skillet over medium high heat melt the butter and whisk in the flour to create a roux. Cook the roux until it becomes brown and smells nutty.
Add in the beef broth, cream, mustard, and Worcestershire sauce. Bring to a simmer over a low heat, taking care not to boil it after you add the cream.
Add the heated meatballs into the pan, and stir to combine with the sauce. The sauce will thicken slightly more as it sits. Garnish with chopped parsley and enjoy.
Video
Notes
Make this sauce and serve with any homemade or frozen meatballs.This recipe is not a good one to make in a slow cooker.The sauce itself has a roux base, which thickens the sauce to create the creamy gravy sauce. When you are creating the roux you let the roux base brown. If you don't let it brown enough at this stage the sauce will be too white, but if you let the roux brown too long it can burn and ruin the sauce, so take care to get it to the right shade of golden brown.