Field Roast Frankfurters smothered in onions and mushrooms. Oh, and did I mention that the onions and mushrooms are sauteed in beer? Yeah, there's that too.
Heat olive oil in a large skillet over medium heat. Add onions and cook for 5 minutes, or until softened. Add mushrooms and cook 5 minutes more.
Add lager, salt, and pepper. Increase heat to medium-high and simmer for 10 minutes, until lager has formed a thick sauce.
Reduce heat to low. Push mushrooms and onions to one side of the skillet. Add franks and cook for 7-10 minutes, turning every 2 minutes or so, until warmed through. (Continue to stir the onions and mushrooms too!) Place franks on buns and top with onions and mushrooms.
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