Step 1

In a medium bowl, combine the egg, cracker crumbs, onion, salt, pepper and sage. Add the beef, and mix well. Shape into two patties.

Step 2

In a medium skillet, cook the patties until browned, four to five minutes per side. Drain off the excess fat. Remove to a platter, and keep warm.

Step 3

In the same skillet, saute the mushrooms in butter for two minutes. Stir in the flour. Add the water and bouillon, and cook, stirring until the gravy is smooth and thickened. Add the browning sauce, if desired, and stir until the sauce is a uniform color. Return the patties to the gravy, and cook, uncovered, over low heat until heated through, about 10 minutes, turning occasionally.

Step 4

Serve the steak over mashed potatoes with plenty of gravy and mushrooms. If desired, sprinkle with parsley.