Rare Deli Roast Beef (cheap is fine!) • Onion, chopped • Mushrooms (whatever's on sale but they should be sliced and this is not a required ingredient) • Low-sodium beef gravy mix • Beef broth, divided • Corn starch • Cumin • Garlic • as needed Potatoes (I make my own but instant is fine if you prefer) • Worchestershire sauce • Potatoes • Real butter (seriously, have you SEEN the ingredients in that supposed "healthy" crap?) •