Step 1

Make the BBQ sauce, if you don’t already have some on hand, to allow the flavors to infuse while you prepare the mushrooms (see notes below for homemade recipe).

Step 2

Thinly slice the mushrooms. They should look shredded.

Step 3

Heat the oil in a large skillet on medium heat.

Step 4

When the oil is hot, add the mushrooms and onions and stir frequently until the mushrooms lose their water and the onions become translucent and soft, approximately 5 to 7 minutes. Depending on the size of the pan, you may need to cook the mushrooms and onions in two batches.

Step 5

Turn up the heat to medium-high and add salt and pepper to taste. Cook until the onions caramelize and the edges of the mushrooms begin to crisp up, approximately 5 minutes.

Step 6

When the mushrooms and onions are done cooking, add the BBQ sauce to the pan and stir until the mushrooms are completely coated in the sauce.

Step 7

Bring the mixture to a boil on medium heat and then reduce the heat to a low simmer. Cook for 15 minutes, stirring frequently, until the sauce is thick and sticky.

Step 8

Serve the mushrooms on the buns and top with the arugula, tomato and sliced pickles.