COOK IT.
Add a splash of olive oil to your griddle top, followed by the sliced onions and mushrooms.
Add a pinch of salt & pepper to the mushrooms and onions, and cook for 10 minutes.
Once the onions and mushrooms have caramelized slightly, shift them to the cooler side of the griddle cooking surface.
Place your seasoned burger patties on the griddle and cook for about 3 minutes per side (or until they’re cooked just the way you like).
Spread the onions and mushrooms mixture on top of the burger patties, add some BBQ sauce on the veggies, and then 2 slices of Swiss cheese.
Cover the patties with a metal plate so the cheese melts everything together. \r\n
While the cheese melts, place your burger buns on the griddle and lightly toast on both sides.
Add some BBQ Sauce to the bottom buns, add the burger patties over the top, and serve it hot off the griddle.