Swiss Mushroom Burgers

There are a few things that I make really well. I'm sharing one with you now. :)
Several years ago I had a friend who worked in the kitchen at Fanny's Grill at the Homestead in Midway. She was dating one of the cooks, who one night taught her how to make these. They don't serve them any more, but if you like Mushroom Swiss Burgers, you should really give these a try. We only make these a couple of times a year for special occasions. I made them this past week for our anniversary and decided to share.

1 hamburger patty per person
1 pkg sliced mushrooms
1 onion sliced
3-5 tablespoons butter
1-2 tablespoons red wine vinegar
garlic powder (to taste)
1 slice swiss cheese per person
1 package brown gravy mix

Melt the butter over medium- low heat and stir in the vinegar. Add the garlic powder and stir until blended. Add the mushrooms and onions and stir to coat well. Then cook them until the onions are transparent. It'll take 10 or so minutes.

Cook the hamburger patty in whatever way you choose. You can grill it if you're being fancy, but pan frying is ok too. Prepare the brown gravy per package directions. Now at our house, we just serve this open faced and sometimes we use bread and sometimes we don't. However, the real way you'd serve it is to dip both halves of a bun in gravy. Put the patty and cheese on the bottom bun. Spoon some of the mushrooms and onions over the top and top with the other half of the bun. The above proportions should give you enough for 4 people. Like I said, at our house it only feeds 2 people, and when we serve it, it looks like this:

Honestly, they are very yummy! Try it out!