3 tablespoons fresh lemon juice
4 tablespoons extra-virgin olive oil
kosher salt and pepper
2 8-ounce packages sliced mushrooms
1/2 cup shredded Jarlsberg or Swiss cheese
1/2 cup fresh flat-leaf parsley leaves, chopped
1 1/4 pounds skirt steak
In a large bowl, combine the lemon juice, 3 tablespoons of the oil, 1/2 teaspoon salt, and 1/4 teaspoon pepper. Add the mushrooms, cheese, and parsley and toss to combine.