Step #1 In a medium bowl, bread crumbs, scallions, mix the ground beef, egg, & mustard; mix well.
Step #2 Shape into four 1/2-inch-thick oval patties.
Step #3 Coat a large skillet with nonstick cooking spray & preheat over medium-high heat.
Step #4 Place the patties in the skillet & cook for 3 to 4 mins per side, or until no pink remains.
Step #5 Add the gravy, water, & mushrooms & cook for 4 to 5 mins, horseradish, or until the mushrooms are tender, stirring every once in awhile.
Step #6 NOTE: You can really make this your own by adding garlic, caraway seeds, or burger Spice uping mix to the meat mixture - or a splash of wine to the gravy.
Step #7 & for a truly all-American diner dish, serve it with mashed potatoes & peas.
Step #8 --.
Enjoy the Blueberry And Amaretti Crumble Tart recipe