Step 1

In a large bowl, combine the ground beef with the egg, bread crumbs, seasoned salt, dijon mustard, ketchup, Worcestershire, and the crushed beef bouillon cube. Work the mixture with your hands to get everything well combined. Portion the meat out into 5 or 6 equal portions and shape the portions into oval patties that are roughly 1 inch in thickness.

Step 2

Heat the oil in a large skillet over medium-high heat, then add the patties. Cook for about 4 minutes on each side until they get a nice golden brown crust. Reduce the heat if necessary to keep them from burning. Remove the patties from the pan to a plate and cover.

Step 3

Pour away all but about 1 tablespoon of the grease from the pan. Place the skillet over medium heat and add the onions. Cook, stirring frequently, until brown and tender - about 6 minutes. Add the water and bouillon cubes to the skillet, bring to a boil, then reduce the heat to a simmer. Smash the bouillon cubes with the back of a spoon if they've not dissolved. Add the Worcestershire, ketchup, and browning sauce. Whisk to combine. Add salt and pepper to taste.

Step 4

In a small bowl, whisk the cornstarch with about 2 tablespoons of cool water. Add the cornstarch slurry to the gravy and whisk to combine. Cooking, stirring frequently, until the gravy thickens. Return the steaks and the drippings in the plate to the skillet. Cover and simmer until the steaks are warm and cooked through. Add additional water if the gravy gets too thick. Serve warm.