Mix together all the ingredients for the burgers. Divide into six portions. Form each portion into a patty about half an inch thick.
Make the mushroom gravy
Melt the butter in a small sauce pan. Add the flour, all at once, stirring to get rid of lumps. Cook, stirring occasionally, until the mixture is lightly to deeply browned (whatever your preference is), about three to five minutes.
Pour in the broth in the thin stream, stirring as you pour. Stop pouring when you reach the desired consistency. Some people like very thick gravy, others prefer thin gravy.
Add the mushrooms, season with salt, pepper, steak sauce and whatever herbs and spices you would like to add.
Complete the dish
Grill or fry in an oil-free pan until nicely seared and just cooked through, about three minutes per side.
To serve, place a burger on a plate (or line them up on a serving platter) and smother with gravy. Sprinkle with fresh parsley, if you like.
Burger (not Salisbury) steak printed from https://casaveneracion.com/burger-not-salisbury-steak-with-mushroom-gravy/ for personal use only. Not for republication nor distribution.