Mushroom Patty Melts

I found this recipe on one of the blogs that I frequent. I loved the mushroom mixture, but I think it would be better if it wasn't made into a sandwich. I thought the bread just made it too filling. I served it with homemade baked Parmesan fries. All in all, it was a fairly easy and delicious meal.

Source: http://jennalaughs.com

makes 4 sandwiches

Ingredients:
1 cup sliced mushrooms
1 tablespoon vegetable oil
1 14-oz can beef broth
1 or 2 tablespoons flour
1 pound extra lean ground sirloin
6 slices provolone cheese
8 slices rye bread
1 tablespoon butter
Salt and pepper, to taste

Directions:
Saute mushrooms in a saucepan with oil over medium heat about 5 minutes. When mushrooms are brown and soft, pour in can of 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. Spread the gravy on the top slice of bread. Grill sandwiches until the bread is toasted.