Heat a cooking pot and melt the butter.
Put-in the onion when the butter melts, and then cook until the onion becomes soft.
Add the ground beef and cook until brown (about 5 to 10 minutes)
Put-in the Worcestershire sauce, salt, ground black pepper, and beef broth. Stir and simmer for 12 minutes.
Add the mix vegetables. Stir and cook for 3 to 5 minutes.
Turn-off heat and let it cool.
Preheat oven to 375 degrees Fahrenheit.
Transfer the cooked mixture to a baking tray.
Arrange the mashed potato over the cooked mixture, and then bake for 25 to 30 minutes.
Remove from the oven and serve.
Share and enjoy!