Cut up the mushrooms: Clean the mushroom by scrubbing it with a paper towel, don’t wash it, as mushrooms can soak up water like a sponge and become soggy. Break off the stem, and slice the porcinis as thin as you can.
Place the arugula & mushrooms into a large mixing bowl
Add the lemon juice and olive oil: Add both ingredients along with a little salt and pepper. Thoroughly toss the salad until the lemon juice and olive oil are mixed and covering every piece of the arugula and mushrooms
Serve in individual bowls and top with parmesan cheese if you have decided to use it.