Mushroom Gravy Patty Melts

Saute mushrooms in a saucepan with oil over medium heat about 5 minutes. When mushrooms are brown and soft, pour in the beef broth and stir. Let the gravy simmer until it reduces to half, about 7 to 10 minutes. Add flour and whisk until combined, until desired thickness. Season with salt and pepper and set aside.

Assemble the ground beef into 4 long, thin patties. Season with salt and pepper. Cook in a skillet over medium high heat for 5 minutes on each side. Put the burgers to the side when they are done.

Over medium heat, melt butter in a skillet. Assemble the sandwiches: bread, cheese, burger, gravy, bread. Use 1 1/2 slices of cheese on each sandwich. Spread the gravy on the top slice of the bread. Grill sandwiches until the bread is toasted.